The whole material is cut and soft and not easily deformed. Highly fit the steering wheel, rigorous craftsmanship. The environmentally friendly rubber inner ring has no peculiar smell and good elasticity. This design is made with PU material and carbon fiber material. The colors : black, grey, beige, blue,red. rubber inside: we have black rubber inside. whtie rubber ring inside and TPE ring. Also you can change the color lines which you like. we have the size range: S:36CM, M:38CM, L: 40CM XL:42CM,XXL:45CM,XXXL:47CM,XXXXL:49CM.