Under Armour Men&rsquo;s HeatGear&reg; Sonic Printed Fitted Short Sleeve Shirt Ultra-soft, smooth fabric provides extreme comfort with very little weight 4-way stretch fabrication allows greater mobility and maintains shape Signature Moisture Transport System wicks sweat away from the body Anti-odor technology prevents the growth of odor causing microbes 30+ UPF protects your skin from the sun's harmful rays