This OC underbust corset is made with durable, breathable 100% cotton. The CS-411 is designed to dramatically shape the waist and to instantly give an enhanced hourglass shape. The 411 has the same curve as the 426, but is shorter and doesn't require as much natural curve in the hip as the 426 does to fit well. This all cotton steel boned waist trainer is ideal for wearing year round both under and over your clothes. Sizes 34-46. Smaller sizes available.