- Tummy trimming in the comfort of cotton. No chest compression. This support tank provides tummy & fatigue-relieving back support while reducing the waistline. From the Core fibers of 35% Dupont Lycra« spandex and 24% Dupont Antron« nylon wrapped with 41% pure cotton, this fabric stretches four ways, providing you with the best fit and compression in total comfort. Made in the U.S.A.