Always ready to cool you down, this high-tech, high-comfort baselayer features a built-in intelligent cooling system that works with your body temperature. Plus it’s lightweight and all-over breathable, ideal for the worksite or campsite. Rebar Evolution 12 Zip T-Shirt Product Features : Greater Arm Mobility™ helps extend arm and shoulder range-of-motion so you can move freelyClimateTEK™ dynamically responds to your body temperature to keep you cool when things heat upFreshTEK™ odor control helps keep you feeling fresh through long hours of wear, Chest pocket Men's Rebar Evolution 12 Zip T-Shirt in Black, Size: Large_Tall by Ariat