Under Armour Men's HeatGear&reg; Tight Fit Tactical S/S V-Neck T-Shirt 4.5 Oz. Polyester/Elastane Ultra-Soft Fabric For The Best In Next-To-Skin Comfort Lightweight, 4-Way Stretch Fabrication Improves Range Of Motion And Dries Faster Advanced Moisture Transport System To Keep You Cool, Dry, And Comfortable Anti-Odor Technology Prevents The Growth Of Odor-Causing Microbes To Keep Your Gear Fresher, Longer