Keep your round inflatable hot tub warm and debris free with this 65 inch round cover lid. The inflatable Pvc cover inflates to a 9 inch dome and holds air at 0.8 psi through a double-layer anti-leak valve, forming a rigid bubble that deflects rainwater, snow and falling leaves. When inflated, the cover creates a thermal buffer above the water surface that slows heat loss and helps the heater cycle less between uses. The heavy-duty 0.