The Blue Wave Silver Grade cover offers strength and durability to ensure years of winter protection and comes with a heavier woven polyethylene scrim and coating that withstands wind, sleet and snow. The cover is UV stabilized to protect it from the harmful effects of the sun, plus it features a black underside to retard algae growth and heat sealed seams to ensure crystal clear pool waters next spring. Blue Wave's in-ground pool cover comes with loops every four feet to secure water bags, and corner grommets that allow for extra tie down in windy areas. It's 5 ft. longer and wider than the pool size, and comes in Forest Green with a Black underside. Backed by a 12-year warranty (2 years full rated).