Under Armour Coldgear Infrared Armour Compression Leggings - AW15 ColdGear Infrared technology - Uses a soft, thermo-conductive inner coating to absorb and retain your own body heat. Dual-layer fabric - With an ultra-warm, brushed interior and a slick, fast-drying exterior. Engineered with closed-hole mesh zones - Allows greater breathability where you need it. Stretch-mesh gusset and inseam panels - Provide strategic ventilation. 4-way stretch fabrication - Allows greater mobility in any direction.