Outdoor deep seat cushion, composed of two seat replacement cushions and two backrest cushions, made of 100% polyester fabric, UV resistant, water resistant and durable. The backrest cushion is filled with environmentally friendly cotton, and the seat cushion is made of high-quality elastic sponge with high resilience, making the transitional filling more comfortable and long-lasting support. The perfect silk thread surround on the back, the edging design of the seat cushion, and the accompanying straps give the cushion a fashionable and perfect look, while also making it more firmly tied to the chair. The seat cushion size is 24"x24", and the backrest size is 22"x24", which better fills the seat and achieves a full state. Not only suitable for deep seats, but also for use as seat cushions, sofas, etc. The rich color selection can make the home more fashionable and unique.