Men's ColdGear&reg; Infrared Thermo Golf &frac12; Zip LOOSE: Full, loose fit for enhanced range of motion & breathable comfort no matter where your workout takes you Dual-layer fabric delivers a smooth, fast-drying exterior and soft interior Bonded hexagon interior traps heat without adding weight for unrivalled warmth, ColdGear Infrared uses a soft, thermo-conductive inner coating to absorb and retain your own body heat 4-Way Stretch fabrication allows greater mobility and maintains shape, Smooth, chafe-free flatlock seam construction, Polyester/Elastane Signature Moisture Transport System wicks sweat away from the body, Anti-Odour technology prevents the growth of odour causing microbes