Under Armour Men's Ua ColdGear Evo Fitted Mock Polyester/Elastane Machine Wash Moisture Transport System - Wicks sweat away from the body, leaving you comfortable and dry. Dual-layer Fabric - With an ultra-warm, brushed interior and a slick, fast-drying exterior. 4-way Stretch Fabrication - Allows for a greater range of motion. Anti-odour Technology - Prevents the growth of odour causing microbes. Flatlock Seams - Reduces the risk of irritation and consequent irritation.