Mens Under Armour Heat Gear T-Shirt Ready to replace your old school performance tee Time to reach for Under Armour Heat Gear. This tight compression top is made with smooth, sweat-wicking fabric to keep you dry & cool. Cut close to the skin to support your muscles, & finished with a breathable mesh panel on the back neck. Body: 90% Polyester / 10% Elastane Mesh: 88% Polyester / 12% Elastane The Details Breathable mesh underarm panels UPF 30+ protects against the suns harmful rays 4-way stretch design moves with you through any workout Anti-odour technology keeps your threads fresh Sweat-wicking finish that dries quickly, size S