This foldable backrest chair is made of upgraded thick PP material, which is durable and odorless, and can be used with confidence. The curved backrest conforms to the curve of the human body, releasing the force on the back of the body. The bench surface is wide and comfortable, which can effectively relieve pressure on the buttocks and prevent fatigue during prolonged sitting. Using trigonometric mechanics design, the structure is stable and does not sway when sitting. It can be folded for storage, saving space without taking up space, and when folded, it will get stuck on the surface of the chair without sliding or tipping over. There are multiple colors for you to choose from.