SmartWool Men's Corbet 120 Vest Front Panel: 100% Polyester; Back: 48% Merino Wool, 44% Polyester, 8% Elastane; Lining: 56% Merino Wool, 44% Polyester; Fill: 75% Wool, 25% Polyester Knit in Vietnam Zipper closure Machine Wash Regular Fit - Back of vest uses knit fabric that concentrates Merino against skin and nylon/elastane against the elements. Merino lined front panel and collar for sweat and odor management - 2 secure zip hand pockets and secure zip chest pocket with media cord routing Center front zipper with draft flab and chin guard Style: SW0SP642