A smart tank works to eliminate bulk under clothes by shaping and streamlining the chest, waistline and stomach while maintaining breathability and comfort using smart Breatheasy™ zones to circulate air and wick away moisture. The ergonomic, athletic fit also helps to improve posture and provide lower-back support. 23" length (size Medium). 92% nylon, 8% spandex; machine wash, tumble dry low. By SPANX®; imported. Men's Furnishings.