Under Armour Men's No Breaks ColdGear Infrared Run Leggings 100% Other Fibers Imported Dual-layer fabric with an ultra-warm, brushed interior & a smooth, fast-drying exterior UA Microthread technology in the calf & side panels so fabric wont cling to you, wont chafe & stretches without absorbing sweat ColdGear Infrared technology uses a soft, thermo-conductive inner coating to absorb & retain your own body heat 4-way stretch construction moves better in every direction Material wicks sweat & dries really fast