GoLite Wisp Jacket.

GoLite’s Wisp windjacket ($50-60) is made out of faerie wings. OK, it’s really made out of alien space fabric. Whatever the material, it’s mysteriously lightweight, so the whole jacket only weighs 2.5 ounces and you can squish it down to the size of a large orange and jam it into a corner of your pack. Yet it works surprisingly well at cutting the wind and keeping you warm, and it’s even a decent repeller of rain, as long as the rain isn’t totally pouring down. I’ve taken it on every hike I’ve gone on for the past three months.