ColdGear Infrared Tech Fleece 1/4 Zip Sweatshirt. 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, collar, and hem. 6.7 oz. Polyester.