Constructed of our strongest and most tear resistant material. This cover features rugged U.V. stabilized woven polyethylene that protects it from sun, snow, wind and ice. It features a black underside to retard algae growth and heat sealed seams to ensure a crystal clear pool next spring. The cover has a big 4 foot overlap that means it will fit pools with wider top rails and will not stretch and rip like smaller 3 foot overlap covers. Our Gold grade cover is held secure by a heavy duty vinyl coated cable and tightener that is anchored to the cover by rip proof metal grommets. This rugged cover is built to last so it is back by a 15 year warranty (3 years full rated). Invest in quality this fall with Arctic Armor Gold.