Our cover is used to protect your swmming pool&spa &hot tub &bathtub and avoid steam loss and keep ... tub cover ,bathtub cover, swim spa cover, swimming pool cover ,lifter for cover ,PVC water pipe and related accessories . 2 Our advantage:1 ... .8) Perimeter skirt that helps keep heat in and Insulate dust and dirty 9) Thread:Double stitched with high grade bonded ...