Product description Humanized Design The portable backrest is made of imported PE, which is friendly, and can effectively release the pressure on the back. It has a non-slip handle, an open cushion, a portable lid bucket, and a special retractable pedal design. Waterproof & Fireproof The memory foam cushion is made of EF fabrics, high-resilience shaped sponge, waterproof, fireproof. It can be used in bathrooms or other humid environments.