The Vevor 18' round pool cover is designed to protect above-ground pools from leaves, dust, and debris while helping maintain cleaner water. Made from durable 420D Oxford fabric with a PVC coating, it offers waterproof, UV-resistant protection for outdoor use. The solar-heating design helps retain warmth and reduce water evaporation. A 360° drawstring locking system provides a more secure fit for safer everyday coverage. It can also be used on other round outdoor items such as pet pools, fountains, and trampolines.