Under Armour Men's ColdGear Infrared Fleece Pants 100% Polyester Imported Brushed microfleece is soft on both sides & delivers superior warmth Smooth Armour Fleece calf & back panels ColdGear Infrared technology uses a soft, thermo-conductive inner coating to absorb & retain your own body heat Material wicks sweat & dries really fast Encased elastic waistband with internal drawcord