Why choose Kohler Freestanding Tub with Claw Feet The materials that are usually used to design this kind of bath tub are various, some are made from acrylic materials, some are from marble or even from stones. It depends on the concept or theme of the bathroom. The claw feet are supposed to hold up the weight of the bathtub and also as additional accessory that beautifies the look of the bathtub. Ideas & Inspirations.