The upholstery is made of PU material with one-step forming technology. The hardness of upholstery is designed according to the principles of ergonomics and controlled to be around C 65±5. So it’s suitable for almost all users. The leather which wraps it does not peel off or fade after getting rubbed 8000 times with a 500g weight. Its color can be Carmine red, Graphite black, Chinese red, etc.