Under Armour Men's No Breaks ColdGear Infrared Run Jacket 100% Other Fibers Imported Dual-layer fabric with an ultra-warm, brushed interior & a slick, fast-drying exterior ColdGear Infrared technology uses a soft, thermo-conductive inner coating to absorb & retain your own body heat ColdGear mesh underarm & inside elbow panels deliver strategic ventilation 4-way stretch fabrication allows greater mobility in any direction