Published June 13, 2011 12:00AM

Patagonia Ultralight Down Shirt
There are no pockets or waistband. The zipper is half-length instead of full. Even the nylon-Lycra cuffs are extra thin to save a few grams. It all adds up to…practically nothing. Patagonia’s six-ounce 800-fill Ultralight down shirt packs to the size of an orange.