Blue Wave’s 8-year Solid Above-Ground Winter Covers are crafted from durable polyethylene featuring a 7x7 scrim count. Designed to protect your pool from the winter elements, these covers will not allow water to pass through the material. A black underside and heat-sealed seams keep leaves, sticks, and other debris out of your pool. Features a generous 4-ft overlap for a proper fit. Includes a metal winch and heavy-duty, vinyl-coated cable for securing the pool cover through the metal grommets that are spaced every 2-feet. Backed by an 8-year warranty with 1 year fully covered.