For decades, hot tub owners have had the same frustrating choice: replace a heavy, waterlogged foam cover or keep dealing with the energy loss, mold, moss, and wear that come with an aging vinyl-wrapped foam cover. AIRCAP by THRML offers a different solution. The AIRCAP is a modern replacement cover designed to be lighter, longer-lasting, and easier to live with.
The AIRCAP 1 is built for hot tub and swim spa owners who want a more durable alternative to traditional covers. According to the company, it uses the same kind of material found in top inflatable paddle boards (drop-stitch), along with heat-welded construction they call AirLoc® for improved durability and weather resistance. It also uses a modular Ziptech™ system that allows the cover to ship fast and fit multiple hot tub sizes with included skirts for a semi-custom fit. The cover corners will also have a standard 6″ radius making them adaptable to most hot tub brands.
One of the biggest selling points of AIRCAP is convenience. The company says installation typically takes just 10 to 15 minutes, and each cover includes a dual-action pump, a repair kit, four keyed locking tie-down straps, and three skirt lengths. That means buyers are not just getting a replacement cover — they are getting a system designed to be easier to manage than a traditional foam cover.
AIRCAP also leans heavily on insulation and energy savings. The company says the cover helps retain heat, reduce evaporation, and improve overall spa efficiency, while remaining moisture-resistant and much lighter than conventional covers. For hot tub owners who are tired of replacing heavy, waterlogged foam covers every few years, that kind of durability can be a meaningful upgrade.
Another advantage is fit flexibility. AIRCAP currently comes in four sizes that the company says cover about 90 percent of hot tubs on the market, with model-specific fit guidance available for brands like Jacuzzi Hot Tubs and Sundance Spas. That makes it easier for shoppers to find a practical replacement without waiting weeks for a fully custom foam cover.
The AIRCAP 1 is not positioned as a cheap cover, but as a premium upgrade. Current pricing to the consumer is listed at $1,000-1,195, which puts it in the higher end of the replacement-cover market but considerably less than competitors like the Smartop. For buyers who value longevity, lighter handling, and less maintenance, the pitch is that the upfront cost can be justified over time.
For more information on how to shop and compare hot tubs before purchasing please visit our hot tub buyer’s guide pages. You can also click on the pink boxes at the top right of every page to get a free local quotes from dealers in your area. Or, click our “Spa Buyer’s Consult” link above to get one-on-one expert advice on how to shop around for the best hot tubs available in your area.
