Size: There are 3 sizes available. Fits most round hot tubs on the market. Please check the detailed dimensions in the product images. We recommend measuring your hot tub to select the correct size. Material: Our outdoor round hot tub cover is made of 210D Ox fabric with an inner silver coating. Durable, waterproof spa cover that is snowproof, dustproof, and lightweight, helping keep your outdoor round hot tub dry and clean. Windproof Design: The spa cover features drawstrings at the bottom edge with cord locks for added security, ensuring the cover stays in place even on windy days. Full Coverage Design: The round hot tub cover fits completely over the entire tub, including the heating element or motor, reducing heat loss and helping maintain water temperature. Easy to Clean & Store: Simply rinse with a garden hose and air dry. Includes a storage bag for convenient off-season storage. Package includes: 1 x Hot Tub Cover + 1 x Storage Bag. Hot tub and other accessories are not included.