SizeThere are 3 sizes for option.Fit for most Round Hot Tubs in the market. Please check the detailed dimensions in the Pictures & Product . We recommend you measuring your Hot Tub to choose the proper size. MaterialOur outdoor round hot tub cover is made of 210D oxford with inner silver coating.Durable waterproof jacuzzi cover.Waterproof,snowproof,dustproof and lightweight,keeps your outdoor round hot tub dry and clean. Windproof DesignThe Spa Cover with drawstrings design on the cover bottom to keep the cover secure on the windiest days, with cord locks for added security to make it won"t blow away in the wind. Fully Cover Hot Tub DesignThe round hot tub cover goes completely over the whole tub and also covers the heating element/motor and prevents a lot of heat escapes around the motor.At the same time can play the role of protecting the water temperature. Easy to Clean&StorageYou can hose it down with water and let it dry in the sun. Comes with storage bag for easy storage.Package including 1 pcs HOT TUB COVER + 1 pcs Storage Bag.NOT including hot tub and others.