Game Changers

HOT SEAT There are lighter carbon-fiber saddles than the Fi’zi:k Arione K:1 but none as gorgeous and, more important for your nethers, as comfortable as this one. Thanks to bits of perfectly placed gel, you can actually sit on it all day. $400; fizik.it

Now Hear This

The JayBird JB–200 Bluetooth Stereo Headset is superlight and water-resistant, and offers crystal-clear sound while hiding unobtrusively behind your ear. $160; jaybirdgear.com

Light Foot

How do you design the lightest marathon-racing shoe on the planet? Look at a bridge. The uppers of Nike’s new 5.5-ounce LunaRacer are attached to the midsole with a material dubbed FlyWire, tiny high-tensile threads that act like suspension-bridge cables—and weigh almost nothing. $100; nike.com

Screen Savers

Polarized lenses block glare but also LCD screens, making it almost impossible to read iPod, GPS, or heart-rate-monitor displays on the go. Until now. The “unbreakable,” photochromatic lenses in Rudy Project’s Zyon are the first to dial back the polarization just enough to let you see screens without missing a stride. $250; rudyprojectusa.com

Look and Touch

Most GPS fitness watches are complicated, clunky affairs. Which is why we love Garmin’s new (and normal-size) Forerunner 405. The menus work iPod style, with a touch-sensitive bezel; it syncs wirelessly with your computer; and, best of all, it doesn’t scream, “I’m a training dork!” $300; garmin.com