Fit & Design: Two-layer engineering traps air between layers providing a natural barrier of warmth Fabric weight: 7 oz. Rib Cuffs Drop Tail for added protection against cold Regular Fit Technology: Inside Layer: 100% ColdPruf® Technical Fiber Polyester with SILVADUR™ Intelligent Freshness Additional Details: Outside Layer: 70% polyester / 30% MERINO WOOL