GPC Winter Covers 18' x 40' Silver/Black Rectangle Solid Winter Cover with Cord and GrommetsOur heavy duty King Cover is designed for exceptional durability, ensuring long lasting protection against harsh winter conditions. The silver and black dual layer design minimizes algae growth by blocking sunlight while providing superior strength to withstand snow, ice, and wind. Reinforced grommets and an included securing cord make installation easy and secure, keeping the cover firmly in place throughout the season. A generous skirted edge adds