Cotton/Polyester Blend A racerback tank featuring a rib knit Low scooped neckline and triple stitching on hemline Machine washable 4 Pack of Racer Back Tops A Basic back tank featuring a rib knit, low scooped neckline and triple stitching on hemline with 27 1/2' Razor back. Unlined, knit and lightweight. Material is 92 % Cotton 8 % Spandex: makes it a Super strech fabirc.