The Large thrml.™ AIRCAP™ Cover is designed to fit hot tubs measuring;
 
89” x 89”
90” x 90”
91” x 91” 
 
Our patent pending Ziptech™ modular system allows you to zip on your proper skirt size using one of the (3) skirt sizes provided for a custom fitted long lasting spa cover.

Made with advanced insulating AirLoc™ technology, the AIRCAP™ cover helps retain heat, reduce energy costs, and minimize water evaporation.

The AIRCAP™ is 10x more durable than a traditional foam cover and moisture-resistant materials ensure a long-lasting performance, making it an excellent addition to your spa.

Easy to install, the thrml.™ AIRCAP™ provides an extra layer of protection to keep your hot tub warm and efficient year-round.