Under Armour ColdGear Infrared Warm-Up Top - Men's Lightweight fleece with a durable, smooth outer & a soft, brushed inner. Stretch-woven forearm panels for greater mobility. Moisture Transport System wicks sweat away from the body. Textured print on shoulders for greater durability. Body: 135g 100% Polyester. Panels: 185g 91% Polyester/9% Elastane. Shaped cuffs & hem for better coverage. Contrast coverstitching. ColdGear Infrared uses a soft, thermo-conductive inner coating to absorb & retain your own body heat.