18x36 Dark Blue Winter Rectangular Inground Swimming Pool Cover w/Water Tubes Pool Size: 18' x 36' Rectangular U.V. Inhibitors Protect the Cover From Sun Damage 4-5 Foot Overlap (cover size is 4-5 ft larger than pool size) Highly resistant to punctures, tears, chlorine stains and other chemical stains Cover Color: Dark Blue Top/Black Underside