Function: 1. Heat retention: The round cover can not only effectively prevent water loss by evaporation, but also maintain water temperature and absorb the heat energy of sunlight to heat the water, reducing the time it takes to heat the water next time. 2. Filtration: The energy-efficient hot tub cover can effectively protect against wildlife and other debris. It can also play a role in preventing dust, reducing condensation, and freezing at the edge. 3. Simple Inflating: Due to the quick and simple filling of the hot tub cover, it can be used in minutes to keep the tub clean and warm. 4. 4,5ft Diameter: The ma inflatable hot tub cover 4,5ft diameter, which is compatible with most of our hot tub series. 5. Limit maintenance: This cover ensures minimal maintenance on your bathtub, while the lid prevents items from entering the water, while also reducing the number of filters used. Specification: Item Type: Inflatable Hot Tub Cover Product Material: PCV Weight: ok. 1653,00 g / 58,31 oz Inflatable size: ok. 140 cm / 55,1 inch List of packages: 1 x Inflatable Hot Tub Cover 1 x User Manual