This technical, super-cooler men's T-shirt is stretchy, Soft and light, and features industry-leading sunscreen and cooling technology, which reacts with sweat to lower the temperature of the material and keep you cool during the intense dynamic aerobic activities, Omni-Freeze ZERO™ super-cooling activated by the Omni-Wick sweat™ Omni-Shade™ upF 30 Classic but modern Comodo elasticated fabric Antimicrobic Length on the back : 71 cm Imported Types of use: Hiking