Long service life and good water resistance. Five sturdy support poles for better support. Ergonomic backrest design fits well with human body. Wide armrests and thick padded headrest for comfort.Nylon wheels to protect the floor from scratching. PU and PVC surface for easy cleaning. Material: PU, PVC, Iron, Nylon, Sponge. Product Dimensions: 74 x 73 x 115-125 cm (L x W x H).