The North Face Men's Thermoball Vest Manmade,Nylon,Polyester Imported Zipper closure Machine Wash Water-resistant, insulated vest packs into its own hand pocket Lightweight ThermoBall insulation retains warmth when wet Fabric: 15D nylon ripstop with 11 g/ft ThermoBall insulation throughout the body, 10 g/ft in the side panels and 13 g/ft in the collar Lightweight VISLON center front zip Covered, secure-zip hand pockets