1.Comfortable and safe 2.Metal frame with memory foam 3.Cloth or PU or leather cover 4.Mult-function mechanism 5.Metal base 1 chair details high elasticity memory foam strong, durable and abrasion resistant fabric cover special thicken metal frame pu cover wheels 90% product made by hand designed by ergonomics2 alternative parts cover material optional: PVC, PU, suede, cloth, and leather five ...