under armour performance shirt - 000 white - xxl under armour the under armour ua performance stretch polo keeps you cool, dry, and mobile. it features a smooth, anti-pick, anti-pill fabric for a more comfortable, snag-free finish and a rib knit collar. additionally it features a 4-way stretch construction, moisture transport system to wick sweat away from the body, an anti-odor technology, and upf 50+ to protect against the sun' harmful rays.