The exterior shell is built from a nylon elastane blend, woven into a stretchy canvas. Chunky baffles house PrimaLoft® insulation and the sherpa fleece lining provides maximum comfort and warmth. This vest will keep you mobile and ultra-warm from dusk to dawn. Stand up, sherpa fleece-lined collar with center front rubber-coated snap closure. Snap closure left chest pocket with accessory cord loop and dual handwarmer pockets. Finished with a vest-length straight hem for layering. FABRIC TECH: Body - 90% nylon, 10% elastane 4-way stretch, 237 gsm with PFC-Free DWR. Lining - 100% Polyester sherpa fleece, 550 gsm. Insulation - PrimaLoft® Black Eco insulation, 133g.