NARebar Workman T-Shirt Product Features : VentTEK™ technology features body mapping to enable air flow and regulate body temperature, Moisture Movement Technology™ wicks moisture away from the skin, Greater Arm Mobility underarm gusset for maximum range of motion, Stain-release, Heavy duty, reinforced chest pockets, Drop tail hem Men's Rebar Workman T-Shirt in Heather Grey, Size: XS by Ariat