Keep the heat in, save energy and make your hot tub up to 40% more cost-effective with the Lay-Z-Spa EnergySense& 153; Thermal Hot Tub Cover. The thermal cover offers a double layer of insulation making inflatable hot tubs more energy efficient as it retains more heat and allows water to heat much quicker. Made from ultra-strong 3-ply UV resistant and water repellent Duraplus& 153; material, the same as Lay-Z-Spa hot tubs, and includes double-stitched seams making it stronger and more impermeable. The thermal cover reduces hot tub heat loss with a thick internal layer of insulating cotton and an anti-mildew treated interior.Easy to put on and easy to take off, it has safety lock clips on an adjustable strap for a tightly secured fit meaning it won& 146;t budge, even in windy conditions, and provides a snug fit essential for heat retention. It includes a zippered door for a built-in pump and it can be removed for external pumps. Features: Makes inflatable hot tubs up to 40% more cost-effective Reduces heat loss and speeds up heating up time Water repellent & UV resistant Duraplus& 153; material Removable zippered door for external pumps & adjustable straps Compatible with round spas with diameters of 236 cm (93 in.) and heights of 71 cm (28 in.) Specifications: Dimensions: H:71.0 x W:236.0 x D:236.0 cm Weight: 11.2 kg Colour: Grey Material: Pvc63%;pet35%;others2% Model Number: BW60331.