Under Armour ColdGear Infrared Tech Fleece Pants - Women39;s 100% polyester Constructed of 100% polyester UA Tech Fleece fabric. UA Tech Fleece fabric uses a textured interior, providing unrivaled warmth for the weight. ColdGear Infrared uses a soft, thermo-conductive inner coating to absorb and retain your own body heat. Signature Moisture Transport System wicks sweat away from the body. Ribbed cuffs and waistband.