Inflatable Hot Tub Cover Dustproof Rainproof Insulated Energy Saving Lid for Square Hot Tub 4.2ft FG05 14.2FT COVER: With a diameter of 4.2 feet, this inflatable cover is compatible with most of our spa hot tub series. Check for better fit! 2EASY INFLATION: The fast and simple inflation of this hot tub cover allows it to be ready for use in minutes, keeping your hot tub clean and warm. 3FILTRATION: This energy saving hot tub lid effectively blocks wild animals and any debris from entering. It also prevents dust, reduces edge condensation, and prevents freezing. Prevents items from entering the water and reduces the need for frequent filter cleaning. 4INSULATION: Not only does the hot hub cover prevent water evaporation and loss, but it also helps maintain water temperature by absorbing the heat from sunlight, reducing the time needed to heat the water for the coming use. 5PVC MATERIAL: Made of premium PVC material, the swimming pool cover is strong and sturdy, wear and scratch resistant, ensuring a long service life.