Are their any compressible synthetic sleeping bags that won't leave you shivering and suffering? I mildly allergic to down, and I often carry a ton of work-related gear, so the space I have in my pack for a sleeping bag is limited. What are the best, most-compressible bags in the 15- and 0-degree ranges? Ben Higginboth Fort Leavenworth, Kansas

I'm moving in two weeks' time to a small island in Micronesia to teach for a year, and I've been told we will have no running water or electricity. Could you recommend an air mattress or cot that will last nine months and be pseudo-comfortable? How about reliable solar-rechargeable batteries? Or a sturdy water purifier/filter? Or anything else for that matter, as I'm at my wit's end! I will mail you coconuts and other treats from the Marshall Islands. Jourdan Mii, Florida

As the years go by, my wife and I find ourselves looking for lighter and lighter hiking and camping equipment, especially in terms of our shelter which takes up a significant portion of our pack weight. What's the word on Henry Shires' Tarptents? Their Squall weighs only 24.5 ounces and offers two people a roomy 44 square feet of space. Could this be the lightweight remedy to aching backs and our three-season shelter needs? V. Tran Galveston, Texas

My 2003 hiking season shall henceforth be known as the "Summer of the Bee," for all the stings I got. The long spell of dry weather was suggested to me as a reason, which I liked better than bad karma! Anyway, I quickly used up the three sting wipes in my first-aid kit and now own both REI's Sting Eze and After Bite. To my surprise, these two products use completely different active ingredients. Which one works best on stings? Chris Silverdale, Washington

I've finally decided to buy a GPS unit. My problem? I don't know which one. Your last review that I can find is three years old, but obviously a lot has changed since then. Rick Lebanon, Tennessee

Luckily, my company is relocating to a place where I'll be able to ride to work! What will I need to commute by bike three or four times weekly? I already have road and mountain bikes, plus the gear, but I don't think my racing garb will work for the daily commute. Loehr Athens, Georgia

I'm so confused by the different possibilities and terminology when it comes to rain jackets for biking. I bought a "waterproof" one, but it wasn't and I got soaked. I bought another and sweated so much that I wished I had the previous jacket. What's a good lightweight jacket for cycling that will keep me dry in moderate rainstorms? Mary Itasca, Illinois

What pants would keep me dry, breathe well, and shed plenty wind, all for under $100? I've had my eyes on Marmot's Precip pants, but what do you think about these? Are there other pants I should be looking at instead? On another tack, I assume you're a member of the Doug Club—oh no, have I given the ge away? Doug New York City

As a longtime reader of your column, you have helped me in the past. Now I need your advice again. I'm considering purchasing a canoe for family camping trips, something stable for small lakes and smooth rivers, nothing too extreme. What do you suggest in terms of size, length, and weight? Also, what type of carrying rack will I need for a shell-equipped Toyota pickup? John Springville, Utah

What's the story on titanium cooksets? A friend of mine has one from MSR and while it's super light, it doesn't seem to heat up as rapidly as my stainless steel set. I like the lightness of titanium, but if I have to bring 50 percent more fuel to cook with, I'm not sure it will be worth the price premium. Steve Young Mountain View, California

Is it necessary to waterproof Gore-Tex boots with something like Nikwax's Aqueous Wax Waterproofing? Mike St. Paul, Minnesota

What's going to be the coolest new gear for 2003? The reason I ask is that I want to buy my boyfriend a really unique Christmas gift. He loves the great outdoors, but is still using his ten-year-old boots and ratty old backpack when we go hiking. I know he'd love to be the coolest hiker on the trail! Caroline Santa Fe, New Mexico

This may be a "gear-related question" with a "you don't need gear for that" answer, but I can't find help on this anywhere. I often hear that running on the beach is one of the most effective ways to boost strength and endurance in your legs. I want to start doing this on a daily basis, and I'm wondering what kind of shoe/sneaker I should you wear. Or do I need to wear anything at all? Mark Brick, New Jersey

Do you have any tips, or can you recommend any sources of information, on how to remove tree sap from the outside of a Goretex XCR shell? Thanks!

O Most Knowledgeable One, what wind pants should I get: the L.L. Bean Guide Pants, made of Schoeller Dryskin, or the Marmot DriClime Stretch Pants? Your pearls of wisdom about the differences in performance are sought. Bill Charlottesville, Virginia

I was looking to buy a general, all-purpose, quality, hardwearing watch for travelling, hiking, work etc and was wondering if you could recommend one. I was looking at Suunto watches but unsure of their quality. Can you recommend a watch for me? Brendan Melbourne, Victoria, Australia

This July I climbing Mount Rainer. My climbing partners have told me that a synthetic bag is necessary because of the rain. They recommended a 25- to 40-degree bag. We are going light and fast, and plan on using open-air bivys, so I think a bag with a microfiber shell would be a good thing. Unfortunately, I not having any luck in my search for the perfect bag. I have stumbled on only a few bags that are synthetic and have microfiber shells. Integral designs makes one, but it uses Primaloft2 as its insulation material. I have been warned to stay away from short-staple fibers because the bags don't last very long. Do you have any suggestions? Mike Ads Newark, Ohio

My wife and I are going bike camping this summer. Are there any light two-person sleeping bags, or single bags that zip together? We need the bag(s)—preferably down filled—to also fold down as small as possible. The cheapest we've found is about $500 for two. Do you have any better suggestions? Harvey Davis, California

My family and I enjoy car camping in Alaska's interior. However, as I get older, I'm finding that my back gets stiffer using my old sleeping pad and that my air mattress doesn't give enough insulation. What type of pad or combination of pad and air mattress do you recommend to minimize back pains, provide insulation, and allow for a comfortable night's sleep? Shane Juneau, Alaska

Is DryLoft on a down sleeping bag worth it? I've noticed that it's not appearing as often as it used to on down winter sleeping bags. David Morlock St. Paul, Minnesota

I have been told that Sierra Designs & MSR's new range of four-season tents (in particular SD's Tiros AST and Stretch Dome AST) have floors that are not suitably waterproof for Australia's wet and windy winters. Is this true? Can a waterproofing agent be applied? Also, do MSR's continuous pole sleeves allow adequate ventilation between canopy and fly? What's the verdict on these tents? Justin Trevorrow Darwin, Australia

I'm a road and occasional trail runner. Given the current season, I'm looking for a pair of shoes with a waterproof component to keep my dogs dry when I'm "on the run." However, everything I've looked at so far seems to lean toward trail running in design. This is fine since I'll be traversing ice, snow, slush, and road crud, but the treads on these shoes seem too aggressive for the road. Any suggestions for a good compromise? Ben Marlborough, Massachusetts

I'm a student who's planning a summer road trip to visit some neighboring states and maybe even Canada. I hope to leave the truck for a few days at a time and do a little backpacking, so I'm looking for a pack. Remember, I'm a starving college student, so nothing too expensive please! Mike San Luis Obispo, California

I have a new Dana Design Shortbed pack, but after packin' for a long ten miles, I noticed that my hands and fingers were swollen. Was this just a bad pack fit, or was it too much weight for the long haul? Ray Kuna, Idaho

I have a Gregory Palisade pack and love it. A number of recent comments and reviews of the Dana Designs Terraplane pack have suggested it is the best pack on the market. However, I find the price of over $400 extreme. Is there something inherent in this pack that would suggest such a premium over the $200 to $300 internal fre packs in its category? David R. Eitemiller Colorado Springs, Colorado

Can you recommend a sturdy sack that will protect a backpack (with tent and sleeping pad strapped on) when it's checked as luggage on an airplane? David Oakland, California

I want to upgrade from a cheap pair of compact binoculars. Assuming I had a pile of money burning its way out of my pocket, would I see much difference between a pair of Nikon Travelites and Leica Trinovids? Also, are there any other models I should look at (through)? Joe Lawrenceville, Georgia

Oh, Gauis Gear Guy (bet you haven't heard THAT one before), I have a multitudinous problem. I wrote to you years ago about detached toenails, and you delivered the goods shiningly. My problem is still with my feet. The last two trips I've taken in my Zberlans boots have left me hobbled, with huge Susan B. Anthony pus-bubbles on either heel. I went to a clinic and was informed that my feet were "problematic" and that I was wearing the wrong boot. My right foot while standing is about a quarter inch longer than the left. My feet are wide and low profile, with anemic arches and narrow heels. Oh yeah, I also have weak ankles. Now I have June trips planned in the Grand Canyon and the Sierra. I've bought the Superfeet shrink-to-your-dogs prosthetic insoles, but I need a new boot. What do you recommend, outside of foot-transplant surgery? Thanks, Thomas Perkins Alexandria, Virginia

Because of a small fire in our house I need to have three down sleeping bags, a jacket, and a vest cleaned. I need some suggestions of companies that will handle this operation and do it correctly. I may find other equipment and clothes as the clean up process progresses that need cleaning also. The smell smoke and soot of a house fire is not the se as that of a campfire! Gary Johnson Collegeville, Pennsylvania

What is meant by the minimum weight on tent specifications? S Weatherley Birmingh, United Kingdom

I plan to buy a bike for my wife, a long-overdue birthday present, to be used mostly on backcountry roads (gravel, dirt, or tarmac) but not on trails. I'm looking for something that is good quality and will be comfortable for a 30-mile ride. A racing bike seems too fragile, while the ubiquitous mountain bike seems like overkill. Is a hybrid (whatever that is!) the way to go? I really require your guidance, as this gift is somewhat late. Steven Westmount, Quebec

I have logged many air miles with my MSR Whisperlite AND empty fuel bottles. I have never been given any problems (including post 9-11 from New York area airports) having them packed in my luggage. I do, however, take a couple of precautions. These include calling the airline before hand and getting the name and customer service ID of the person I talked to, keeping the fuel bottle clean and uncapped (leave some soap residue inside so it will smell clean), and always checking in at the counter so you can tell the attendant that that the thing that looks like a bomb is a stove and bottles. Most of the time the attendant checks the equipment and that is all (sometimes they mark my luggage with a weird tag). I have on other occasions had an attendant repackage the stove in the airline's special box. I feel that if you are up front about it and take a little care, things will go smoother. However be prepared for the guy who is a hard nose as you may still lose your stove. Jonathan Cushing New York, New York

I'm in the market for a decent down jacket but don't want to fork over the money for a Feathered Friends Rock & Ice Parka, as good as it is. What do you know about the Frobisher 700 Parka from Mountain Equipment Co-Op (a Canadian company)? It's stuffed with about 16.5 ounces of 700-fill down, has a Dryloft shell, and sells for about $285. It seems like deal to me! But I'm curious how it stacks up against Mountain Hardwear's Sub Zero SL Parka. Any help would be greatly appreciated. Michael Gebhardt Chattanooga, Tennessee

Gear Guru: I work out almost every day, so I need a lot of base-layer garments. When it's not too cold out, my CoolMax Alta turtlenecks seem a good deal. But what about the other, pricier options? Do these have wondrous additional capabilities worth the extra cash? David Portland, Oregon

Raichle's Mountain Trekker backpacking boot is the best boot I have ever owned, and I would like to purchase another pair. However, I can't find anyone that carries them anymore. Could you help me out with information on where I could get a pair? Trevor Calgary, Alberta

I read the article about the Crawford Survival Staff in the 2000 Buyer's Guide, but I wanted to ask if it's really worth the $225. You're the only source of reliable information I have! Did you actually field-test the staff? Alex

I'm planning a 14-day backpacking trip down Utah's Escalante River next month, and puzzled about the ideal footwear to pack. The route involves lots of wading, often over rough riverbeds, as well as slickrock hiking, all while lugging a big pack. Is there a boot out there that can provide good drainage as well as some serious support? David Grinnell, Iowa

How do I get Christmas-tree pitch out of a Gore-Tex jacket? Karen Gresh, Oregon

Oh Gear Guide, you have failed us! Over and over I have heard you espouse the quality of the Yashica, so I decided that the T4 was the camera for me. Unfortunately, after hours of searching, I find out that the T4 has not been made for years! Just recently, you suggested the camera but didn't mention that it would be impossible to find. With the T4 no longer on the market, what kind of camera would you suggest? Mike Newark, Ohio

I'm a self-proclaimed "active" person striving to be at least mediocre at several "outside" activities, such as mountain biking, kayaking, backpacking, etc. I have a Ford Ranger truck, and finding it quite a challenge to figure out how to fit all my stuff on there -- with more than one person coming along, it gets really tricky! I'm wondering what the best way to transport kayaks on my truck would be. I have an aluminum truck box already taking up half of the bed (placed lengthwise on the driver side). I have mounts to put two bikes on the other side of the box in the bed. But how will I carry a kayak? Help! Owen Fennern San Jose, California

For a very long time I've been looking for a camera to take backpacking. I messed around with digitals, but decided they were not practical and didn't have a good enough zoom for my purposes. So, now I'm looking to get an SLR. Do you have any recommendations on a good camera and some good lenses for an amateur not wanting to bother with tons of manual setup? Benjamin Tempe, Arizona

Do you think the Bibler's Tempest is too much tent for Oregon's Mount Hood? I'm looking for a four-season tent in the $400 to $500 price range. I plan to live in it for a while (at least three to four months) as a volunteer. Joe Venice, California

Is it necessary to waterproof Gore-Tex boots with something like Nikwax's Aqueous Wax Waterproofing? Mikebr>St. Paul, Minnesota

I'll be skiing in the Austrian Alps this winter. What's the essential gear for avalanche safety? We're not all supported by James Bond-level technology, but I was wondering what sort of equipment you'd recommend for going off piste. Brian York, United Kingdom

I have been hearing about MSR's lightweight and very compact Pocket Rocket stove. But the fuel for it seems to weigh a lot more than the white gas that I use now for my MSR Whisperlite. Is the fuel for this new breed of stoves heavier than other fuels? And if so why does everyone think they are saving so much more weight when they are making up for it in the weight of the fuel? Justin Strasburg Lincoln, Nebraska

Your Gearness, I started mountain biking about two months ago and bought a Gary Fisher Tassahara. I bought all of the needed accessories—Celbak, spd shoes, and clipless pedals—but have a question regarding shorts. I bought three pairs of six-panel Lycra shorts and love them. But, I see a lot of mountain bikers wearing baggy shorts. What do you think of them? I tried a pair of Zoic Vigor shorts and the Lycra liner's pad felt thin. What do you think about just using the six-panel short and putting knee length Cordura hiking short over them? Patrick Fetizanan Chicago, Illinois

Hola Señor Gear: After ten days of tromping in the Peruvian rainforest in borrowed rubber boots, my insteps are bruised from roots and stumps and my toes want to grip the inside of my shoes for stability. Yet, I'm convinced that rubber boots are the only way to go in jungle conditions. Are there rubber boots with hiking boot soles and at least a little support for the ankles? Bob St. Louis, Missouri

My fiancC) has an old REI dome tent that she loves and always insists on bringing, though I'm convinced, because of its age, it's destined to soon become just some tattered prayer flags along the trail and leave us shelterless. She doesn't like any of the current tent designs because their vestibules completely protect the door and prevent you from being able to easily watch the rain. The REI dome is great because its door has two parts—a screen door and ripstop nylon door that you can zip part of the way up to keep rain out. Does anybody still make a dome tent like this? Mark Scantlebury Portland, Oregon

What's your take on Backpacker's Pantry Outback Oven? Does the Outback Oven really bake well and also conserves fuel for cooking traditional grub? After a zillion meals of mac and cheese, ren, gorp, and dried fruits, the Ziplocs carrying the food start looking more appetizing then the food within. The idea of dining on hot cinnon rolls, fresh pita bread, pot pies, or (gasp!) brownies does make me wonder if the Outback Oven really works or if it's just another ravenous hikers delusions? Ed Beaudry Laurel, Maryland

Years ago you recommended The North Face Snowshoe sleeping bag to me, just the ticket for a dp 58 hours in Lapland's freezing rain! Since your record is one for one, I seek your advice again for a compact, light sleeping bag (down is out due to allergies) to use when backpacking in Croatia in August. We'll be sleeping hut-to-hut while walking in the countryside, while also spending some time in cities. Do you think Design Salt's silk liner is good enough for such a trip, or do we need an ultralight sleeping bag? Jan Helsinki, Finland

I would like to know what the difference is between Marmot's 800-fill Couloir and 600-fill Never Summer sleeping bags if they both have a rating of zero-degrees. I'm going to Patagonia in January and would like to know which bag you would use, although I'm not yet sure what elevation I'll be at. Hans Norton, Massachusetts

What's the scoop on Eureka's Zeus EXO line of single-wall backpacking tents? They're inexpensive, light for the square footage, and look to have the se super-quick setup as the larger Eurekas. Do you have any info on how well these tents vent? Bill Charlottesville, Virginia

I'm planning a summit attempt on Mount Rainier this August and a possible bid for Denali in May 2004, so in the process of upgrading my gear, particularly boots and sleeping bag. My budget may not allow for separate gear for each climb. I've been looking at Millet's Everest Boot and the North Face Inferno bag as my options, but prices are steep! Do you have any other suggestions, and is this gear suitable, or even overkill, for both climbs? Michael Stoneh, Massachusetts

What tools do I need, and how do I build a good snow cave for winter camping in the Colorado Rockies? Daniel Denver, Colorado

I often ski and snowshoe in the Adirondacks backcountry, but my back always gets soaked under my pack whenever I'm going uphill. I have tried different layers to avoid the wetness, all to no avail. What do you recommend to keep my back comfortable? Ian Lake Placid, New York

I'm looking for a hydration pack that I can use for cycling. But, I also want to be able to stick the bladder in my Gregory backpack for extended hiking trips, thereby knocking out two birds with one bladder. I have looked at products from CelBak and Gregory, but what do you recommend? Ronald Cookeville, Tennessee

I'm discovering that my late-fortyish feet are inexorably growing longer and wider, and the hiking boots that served me well two years ago are now giving me blisters and scrunched toenails. Companions on a recent Sierra backcountry hike were wearing low-cut trail shoes that looked only slightly more rugged than running shoes, and which allowed their wearers to pretty much dance over the rocks and scree without twisting ankles. For hiking relatively rugged trails without a backpack, what sort of characteristics should one look for in such shoes? And, while I'm here, can one backpack in 'em? Richard Truckee, California

When out hiking, I'm tired of getting my good-quality boots soaking wet when crossing knee-high stres. Worse still, repeatedly taking off my boots and putting on sneakers or water shoes is a drag, not to mention time consuming. So what's the solution, gear sage? Are there any "water boots" that are sturdy enough to handle trail hiking with a 25 to 35 pound pack, but that can also withstand multiple stre crossings and total immersion? Surely I'm not the only soggy hiker out there. Mitchell Fountain Valley, California

I'm getting back into backpacking after a 20 year hiatus and boggled by the array of different stuff they're making socks out of these days. Merino wool, acrylic, Coolmax, ultimax, wickdry??? What's the deal on fabrics for HOT weather hiking/backpacking for short-to-medium trips (one- to two-day) over varied terrain and carrying moderate loads? What's good, what's bad? Lew Atlanta, Georgia

I own a 1994 Isuzu Trooper SE that has a moon roof and a factory luggage rack. I looking for a roof rack system to carry bikes. I've looked through Thule and Yakima online, and wondered if I could use the existing luggage tracks and buy towers to go with them and then the bars. I really want something for the roof, not a tire or hitch mount. WD Ray Columbia, South Carolina

Yes, as an overpronate runner weighing in at 210 pounds, I probably should take up a less impact-prone sport. But I'm still running, so I need some shoes with torsional stability and impact-absorbing capability. For the past year, I have been running in a pair of Brooks Beasts, which have worked pretty well, but not perfectly (Spenco insoles helped some). Can you recommend several running shoes that are suited for a runner of my build? Charles New York City

Your Gearness, I planning to drive cross-country this summer, hiking and camping wherever the road takes me. For the driving portion, I was thinking of investing in a GPS system to help with the "figuring-out-where-the-heck-I-am" moments. Do you have any advice as to the value of GPS for this? (I will not need it for hiking, using the old-fashioned technique of map, compass, and trail blazes) Realistically, I'd like to stay under $300, but will go higher for an exceptional device—one that does the navigating, driving, AND laundry. Charles New York City, New York

Much of my clothing made with high-performance fabrics, such as Coolmax, states that you should not use fabric softeners or dryer sheets. Why is that? If they are accidentally dried with a dryer sheet will they return to normal after the next wash or are the performance aspects ruined? Joe Helm Canal Winchester, Ohio

Oh Great Gear Voice of the Heavens, What's a nice, dry, two-person, three-season tent with two doors and vestibules? My current tent is a Sierra Designs Orion AST. It's a very well built tent and stayed completely dry in a very wet trip to Deer Lake in Olympic National Park. I like being able to use only the rain fly and ground sheet as well as the window in the fly. The problem is that the very slanted door lets stuff collect in the tent entrance and makes zipping and unzipping tough. It also makes the vestibule useless for anything but boots. I hope to get a new tent with two doors that are straight up and down, but don't want to lose the high quality and rain-proofness. I willing to give up a little in weight if I could get a ground sheet that covers the floors of the vestibule as well. Chris Barnes Bremerton, Washington

I've been skiing for years and haven't needed to buy new thermal underwear in a long time. But now that I'm ready to replace it, several new materials are on the market. I know I don't want cotton, but what about silk? Wool? Or should I just stick with polyester? y Kuntz California

I'm looking for a mountaineering boot for tackling some of the Lower 48's fourteeners. I've reviewed the Koflach Degre and the Asolo Guide, but I'm also interested in some of the newer leather boots, like the Scarpa Cerro Torre Thermo. Have the new insulated leathers finally become an acceptable solution, or should I stick with doubles? Matt San Ron, California

Are candle lanterns safe to use in tents for light? Obviously you'd want to keep an open fle away from the tent walls, but are they as safe as a battery-powered lantern? John Bergquist Corvallis, Oregon

I'm 55 and like to ride bikes. Here near Lake Michigan in late spring, it's often sunny and cool. I see a lot of die-hard bikers wearing tights, but I'm not interested...is there anything else I can wear? I tried tennis warm-ups, but they're too slippery on the bike seat. Stu Highland Park, Illinois

What's the best crampon for the LaSportiva K3 boot? Can I use semi-rigid crampons with them to climb vertical ice? I need crampons for that and glacier approaches but am afraid that if I get a fully rigid crampon I will get to much balling-up effect with the snow. Joe Roop Prescott, Arizona

I have a 15-year-old Peak 1 stove that still works great. I was wondering if I could use cheaper unleaded gasoline (about half the price of Coleman fuel) without blowing me or my friends up. Or do I need to get a newer model made for both white gas and gasoline? J. D. Craft Lancaster, Ohio

I have a simple question. I dried my jacket on a high temperature in the dryer. Everybody tells me I shouldn't have done this, but how will it affect my jacket? Adrien Lancaster, United Kingdom

G'day Gear Guru, I've noticed a couple of innovative water-purifiers that incorporate the filter mechanism directly into the cap of a light, convenient, and squeezable water bottle. Models by Orinoco and SafeWater Anywhere make lofty claims of filtering and purifying the nasties better than traditional pump-style filters; the SafeWater model even has a filter cap that fits onto Nalgene bottles. Is there any point to lugging around our old pump filters anymore? Lange Sydney, Australia

Oh Gear Oracle, I have a problem with a build-up of moisture within my mittens, not from rain or snow, but from my own perspiration. This is especially true during snowshoeing trips. I was wondering if there are any shells that have little or no insulation, allowing me to layer them inside and increase the breathability of the mitten. Dennis Portsmouth, New Hampshire

Oh Gear Guide, you have failed us! Over and over I have heard you espouse the quality of the Yashica, so I decided that the T4 was the camera for me. Unfortunately, after hours of searching, I find out that the T4 has not been made for years! Just recently, you suggested the camera but didn't mention that it would be impossible to find. With the T4 no longer on the market, what kind of camera would you suggest? Mike Newark, Ohio

At what point, if ever, should your boots be replaced? Is it a question of mileage, time, or condition? I've had my boots (L.L. Bean Knife Edge, leather) for a number of years. They are well maintained and comfortable. Is there a point where the boot does not perform its support function and the trade off between comfort and support (in favor of comfort) is not worth it? Jim Comerford Wyncote, Pennsylvania

Your Gearness, I'm in desperate need of your expert advice. After two major knee surgeries involving saws, metal plates, and screws, I have suddenly become an advocate of trekking poles. I own a set of Master Kompressor poles with comfortable handles and a useful shock-absorber option. However, I've been tempted by a pair of Leki Ultralites, which are six ounces lighter but without the shock absorbers. At five-foot-one and about 120 pounds, do I really need poles with shock absorbers, or is it a waste of money for me? I have my sights set on the Grand Canyon this spring and would like to have time to "road test" a set of poles before then. Paula San Diego, California

I have been trying to decide between the PUR Guide water filter and the MSR MiniWorks, although I have heard that the MSR clogs less and is cleanable. However, the MiniWorks' high pump per liter ratio has turned me off, especially as the PUR Guide boasts a more efficient output. I will be using the filter mostly in high alpine areas where the water is fairly clear of mud and silt. What are your thoughts? Jim Huntsville, Utah

What are the key factors one should take into account in purchasing a road/touring bike? Brent Ithaca, New York

I want a chest pack to carry my Pentax 67II camera and its lens. It will need to have padded shoulder straps and a strap to hold it tight around my waist. Any ideas? Kiim Clackas, Oregon

I've been looking at water purifiers and have narrowed it down to two-the First Need Deluxe and the Sweet Water Guardian. I've read some on both and I've heard of the Guardian breaking on hiking trips and not being field serviceable. I haven't been able to get much info on the First Need Deluxe, only that is clogs. Which do you think is better and why? Kyle Waco, Texas