4D air mesh technology allows water and air to easily penetrate and dry quickly, which can prevent the growth of odor, mold or bacteria. The bathtub cushion contains 6 suction cups, which can create suction on smooth surfaces, allowing the cushion to be attached to the bathtub. SPA bathtub cushion with high-elastic polyester fiber and soft 4D fabric makes the bathtub cushion so durable and wrinkle-free. After a bath, remove the suction cups from the bathtub cushion with the separation card and hang the bathtub cushion hygienically on the hook of the bathtub cushion. Our bathtub cushions can be washed cold with mild detergent. (excluding other clothes). With built-in hook for quick drying, you will enjoy this warm gift. The thick filling material provides support and high elasticity to give you comfortable enjoyment and relieve physical fatigue and reduce back and neck pain.