The Axis Cover System is available for order for Master Spas swim spa models Trainer 12, Trainer 15, Trainer 19/Momentum models. This premium cover raises the bar for swim spas covers. The design features the best materials and unmatched fit and finish. The high quality swim spa cover is user-friendly and can be placed on the swim spa and taken off the spa with ease by one person. Designed o fit tightly, using Master Spas’ unique fastening system, the Axis Cover System sits securely to your hot tub to ensure the longevity of both your spa and your cover.