The Bestway Steel Pro frame pools are designed for strength and reliability. This 20in deep pool has a water capacity at (90% full) of 446gal (1,688L). It has a rust-resistant metal frame. The extra strength side walls are made with 3 separate layers of material. The inner layer of polyester mesh is laminated to the 2 outer heavy gauge PVC layers. It has a flow control drain valve for easy draining. The valve attaches to your garden hose so that water can be drained away from the pool area. It also has a UV 40+ Rated Sun Shade with water mister.