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Increase your speed and leave a small footprint when you wear the Under Armour® Men's Catalyst Run T-Shirt. Built with runners in mind, this lightweight tee stretches to move with you while maintaining its shape, wicks moisture away so you stay dry, and protects your skin from the sun's damaging rays. With chafe-free raglan sleeve construction and anti-odor technology, the UA Catalyst Run Top keeps you moving in total comfort.