twenty Static Rib Tank in Gray. - size L (also in S) twenty Static Rib Tank in Gray. - size L (also in S) 50% viscose 50% poly. Hand wash cold. Rib knit fabric. Adjustable shoulder straps with tie closure. TWER-WS64. HR0S 016. Twenty has transformed a fashion essential by giving the classic knit tee a luxurious and modern take. Crafted from amazing fabric, twenty creates super soft tees, knit dresses, bodycon skirts, and cozy sweatpants that will quickly become everyday staples in your wardrobe.