The dirt defender gold grade cover is 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 features a big 4-feet overlap that means it will fit pools with wider top rails and will not stretch and rip like smaller 3-feet overlap covers. This dirt defender gold grade cover is held secure by a heavy duty cable and winch tightener that is anchored to the cover by rip proof metal grommets. This rugged cover is built to last, backed by a 15-year warranty (3-year full rated). Invest in quality this fall with dirt defender gold. This dirt defender cover comes in navy blue with a black underside.