Material:Using 170G top polyethylene material in the filed,all Sew thread are 100% waterproofFunction:Protects your Hot Tub from Dirt, Dust, Rain, Hail, Bird Droppings etc.locking Systems:With Adjustable wind belt to make cover tighten to prevent blow off during high winds and severe weather.Warm Tips:this cover not be used by itself without an insulated hard cover under it.Extra Install Door Design:Making customer very easy to install it and make the cap tighten.is Ideal for use on hot tub hard cover.About Shipping: All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances.Any questions, please feel free to contact usDuring the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours, wish you a happy shoppingThanks for your cooperation and we'll make you feel satisfied.