Dual-layer fabric with an ultra-warm, brushed interior and a smooth, fast-drying exterior. Stretch-mesh back and underarm panels provide strategic ventilation. Four-way stretch construction moves better in every direction. Material wicks sweat and dries really fast. Anti-odour technology prevents the growth of odour-causing microbes. Ergonomic design keeps seams off of high abrasion areas. Mock neck construction for added coverage and warmth. 100% Polyester.