Under Armour Men's ColdGear Infrared Armour Scent Control 1/4 Zip 88% Polyester/12% Elastane Imported Fitted: Next-to-skin without the squeeze Exclusive UA Scent Control technology lasts longer & works better, keeping you undetected ColdGear Infrared technology uses a soft, thermo-conductive inner coating to absorb & retain your own body heat Dual-layer fabric with an ultra-warm, brushed interior & a slick, fast-drying exterior 4-way stretch fabrication allows greater mobility in any direction