WARNING! This product will melt when exposed to extreme heat or open flames, posing a risk of serious injury where melted product comes into contact with skin!. 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. Moisture Transport System wicks sweat away from the body. Quick-dry fabrication keeps you light and comfortable. Anti-odor technology prevents the growth of odor causing microbes. Smooth, chafe-free flatlock seam construction. Tonal logo for uniform wear. Polyester/Elastane. Imported.