Under Armour Unisex ColdGear Infrared Arm Sleeve 87% Polyster/ 13% Lycra Imported ColdGear Infrared uses a soft, thermo-conductive inner coating to absorb and retain your own body heat Dual-layer fabric gives you a soft, warm interior and a smooth, fast-drying exterior 4-Way Stretch fabrication allows greater mobility and maintains shape Material wicks sweat & dries really fast Full arm coverage