1WIDE COMPATIBILITY: The inflatable hot tub cover has a diameter of 5.3 feet, compatible with most hot tub series, you can use it with confidence. 2EASY INFLATABILITY: Fast and easy to inflate, it can be inflated and ready to use in minutes, very convenient and effective in keeping your hot tub clean and warm. 3FILTERING FUNCTION: Keeps your hot tub clean by effectively blocking out wildlife and any residual debris. It also keeps out dust, reduces the incidence of condensation and icing around the rim. 4INSULATION FUNCTION: Not only is it effective in preventing water loss through evaporation, but it also maintains the temperature of the water. It absorbs the heat from the sun to heat the water, reducing the time it takes to heat the water next time. 5PVC MATERIAL: The inflatable hot tub cover is made of PVC material, which has good durability and can provide long term protection for the hot tub.