VEVOR Solar Pool Cover, 18 ft Round Pool Bubble Cover, 16 Mil Pools Solar Blanket with Bubble & PE Material, Daytime Heat Absorption, Nighttime Heat Retention, Heat Retaining Solars Covers, BlueAdvanced Micro-Bubble Heat RetentionStrong 16 Mil MaterialCustomizable for Any Pool ShapeLong-Lasting ConstructionHassle-Free Pool CareEasy CustomizationThickness: 16 mil,Color: Blue,Item Model Number: 400-18,Product Dimensions: ø18 ft/ø5486mm,Net Weight: 18.96 lbs/8.6kg,Main Material: PE