Countdown the months to summer fun knowing your pool is in the good hands of this Robelle Supreme Plus Winter Cover. The cover was constructed from a durable, rip-proof polyethylene material with a weave that features 12 vertical and horizontal threads per inch. The cover’s top is teal-colored and has been treated to inhibit potentially damaging ultraviolet rays, while its underside is strategically colored black to prevent the growth of algae. To reinforce the cover’s hem, the perimeter features a one-and-a-half inch binding with two lines of double chain stitching. The cover comes with a 15-year warranty.