Unlike down, Puffballs don't need constant pampering to keep them dry; they retain their insulative qualities even when wet. They're also lightweight, compressible, wind-resistant and add warmth to any layering system. The slick polyester shell and nylon ripstop lining slide easily over or under layers. Both garments stuff into their own vertical zippered chest pocket and take up very little room in your pack. Imported. Unisex Puffball Pullover