End 2 End Swim Spa Covers 18BE2ESPTDA 18' Black Aquex Swim Spa Cover has revolutionized the swim spa industry by correcting the number one problem for swim spa ownership. Old-style bi-fold covers absorb water and gain weight; they break down in the elements due to rain, snow, or direct sun, allowing heat to escape through their sections and seams. This is one-piece design creates a complete seal all the way around the swim spa or in-ground pool, locking in the heat, lowering energy consumption and cost. It is user-friendly and designed for a single family member to access the swim spa easily, on a daily basis.