Made to live under stormproof shells, these very light, wind-resistant Puffballs add warmth to any layering system but without the bulk. And because they compress so well, they make great emergency gear. Puffballs have a slick, 1.3-oz. 30-denier ripstop nylon shell with a DWR (durable water repellent) finish, and a lining that moves freely over layers. Unli ke down, synthetic (Microloft) Puffballs will keep you warm even if they're wet. Both garments stuff into their own pockets. Made in USA.