Hot Tub Covers & Spa Covers - Free shipping! 6 inches thick, R23.85-R37. Custom made outdoor hot tub covers. Largest U.S. manufacturer. 5 year warranty. Lowest price guarantee. *Shipping is free 99% of the time, but not for areas freight companies consider remote like Alaska, Hawaii, Wyoming Montana, Maine, Vermont, New Hampshire, etc. and almost all islands. Enter your specifications below to Design-Your-Own spa cover so it will be manufactured with only the components of your choosing, tailor made to your size, for your use and your environment. 90% of the insulated spa covers we manufacture are made from specifications provided by our clients and not by the make, model and year of the hot tub. We provide the industry's best guides so you can easily and accurately order your replacement hot tub cover. At each step below, we provide easy to understand explanations , photos , calculators and even videos . Every question is clearly explained so all you have to do is make your selections. Every specification required is entered on this single page. To order your replacement hot tub cover, and to get a final price, begin making your selections below. The total price will be displayed above and at the bottom of the page. Then, click "Add to Cart" at the bottom of this page to begin the checkout process.