Buffalo Blizzard 20-Foot-by-40-Foot Rectangle Winter Cover for In-Ground Swimming Pools (Supreme Plus Green/Black) SUPREME QUALITY - The Supreme Winter Cover won't crack, split or tear from the cold! Our winter covers are made strong, durable and tough enough to withstand a cold, harsh winter season. This winter cover is also lightweight, making it easier to put on and take off of your swimming pool as well as taking up less space for off-season storage! Its "Hold-tite" reinforced seams will last longer and won't rip, fray or come apart. FULLY COVER YOUR POOL - The Buffalo Blizzard Pool Winter Cover for above-ground or in-ground pools comes with 5 ft. of overlap allowing for a secure installation. This additional material is used to compensate for lower water levels, use of an air pillow and the swimming pool top rails. Secure this cover to your swimming pool with brass grommets placed every 4 and extra heavy water bag loops every 4' to keep your water-bags in place. DRAIN THE RAIN - Winter covers are designed to protect your swimming pool against rain, snow and high winds. It is highly-recommended that all excess water be removed from atop the cover during the off-season. This will elongate the longevity of the material and can be accomplished with use of a cover pump or siphon. DESIGNED TO DEFEND - Close your swimming pool confidently with double stitched and triple thick hems using UV resistant nylon threads that are used to withstand the sun. This lightweight cover has 12x12 scrim per square inch.Made from tough polyethylene fabric it's the toughest, most durable material available that keeps unwanted items from falling into your swimming pool while closing it up for the season. WINTER IS APPROACHING - The installation of a winter cover will likely require some assistance from friends, family or a friendly neighbor. In advance of seeking help, the water level should be lowered beneath the skimmer, winter plug inserted and the water winterized with closing chemicals.