Under Armour Style Heat Gear Short Sleeve Full T-Shirt Mens Fit: Compression--Supports your muscles to prevent fatigue during intense training. Performance Technology: Under Armour HeatGear --For when it's hot. HeatGear technology wicks perspiration off your skin, rather than absorbing it. It's engineered with UA's Moisture Transport System to deliver core temperature regulation and maximum breathability. Anti-Microbial--Anti-microbial treatments provide permanent odor protection by inhibiting the growth of bacteria and mildew in the fabric. Ergonomic Cut/Seaming--Seams and/or design lines of the garment follow the body's curves to allow freedom of movement and prevent skin irritation. Fabric Content: 81% PolyArmour, 19% elastane