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 Oxford fabric with an inner silver coating. Durable, waterproof spa cover that is waterproof, snowproof, dustproof, and lightweight, helping keep your outdoor round hot tub dry and clean. Windproof Design: The spa cover features drawstrings at the bottom with cord locks for added security, helping prevent the cover from blowing away on windy days. Full Coverage Design: The round hot tub cover fits completely over the entire tub, including the heating element or motor, helping reduce heat loss and maintain water temperature. Easy to Clean & Store: Simply rinse with a hose and air dry in the sun. Includes a storage bag for convenient storage. Package includes 1 x hot tub cover and 1 x storage bag. Hot tub and other accessories are not included.