This thing does what ordinary athletic T-shirts can’t even pretend to do. Our Men’s HeatGear® Compression T-Shirt gives you ridiculous stretch to keep you mobile. The compression fit boosts muscle performance. Odor-blocking fabric wicks sweat to keep you cool, dry, and light. And the 30+ UPF protects against the sun. Simply put, this sets the standard for compression baselayer T-shirts. That's why so many have tried to imitate it.