4" Thick Premium Spa Cover Amazon Payments accepted! No need to pay full retail. Buy direct from the manufacturer, pay wholesale and save your time and money. We will deliver to your residence in 7-10 days. Feel secure - we have made covers for 24 years. All covers come with our "surefit guarantee" and are backed with a 5 year warranty. Order directly via our web site. Standard hot tub cover - 4" thick Create a cover to suit your needs with our exclusive "Design-Your-Own" ordering system. We follow up with every order to make sure it's perfect.