This Triple Belt detachable waist trainer is 96% cotton and 4% spandex. The lining is breathable and stretchy for all day comfort. It has a durable zipper which holds the shaper better and 7 steel bone to increase the support. 3 detachable hooks and loop waist belt allows you to choose the compression rating to get a proper tummy control. Good for everyday use jogging, running, yoga, aerobics and more. Please hand wash in cold water.