The wait for the return of summer fun in the pool is made worry-free with this Robelle Super Guard Winter Cover. Made from a durable and innovative blue polyethylene material, the top of this cover is blue and treated to protect against damaging ultraviolet rays and comes in a strategic black color on its underside, which helps prevent potentially damaging algae growth. Also featured is a scrim of eight vertical and eight horizontal threads per inch, plus a five-foot overlap that ensures complete coverage of the area of your pool. Water bag loops are made with double-stitching are spaced four feet apart with an aluminum grommet for maximum reinforcement. The cover comes with an eight-year warranty.