The 2-piece soft padded seat cushion fits roba high chairs item no. 7562 (Sit Up), 7566 (Sit Up Maxi), 7569 (Sit Up Fun), 7570 (Sit Up Super Maxi), as well as many other common stair high chairs. The high chair insert is made from a cotton/polyester blend (65% polyester and 35% cotton) and has been coated with phthalate-free PU. The surface fabric is particularly skin-friendly and cuddly for your child and yet easy to clean with a damp cloth and machine washable in case of larger stains. Soft padding, the extra thick side padding and the high backrest provide a very good grip and best seating comfort. All materials used are certified for harmful substances and are regularly tested.