The Michael Phelps Legend Series spas are industry leading ultra-premium hot tubs. They offer a luxurious hot tub experience that is second to none. The LSX 900 is the Michael Phelps Legend Series flagship model. This hot tub is the largest size of hot tub that you can get before entering into Swim Spa sizing. The LSX 900 offers the very best without compromise, it combines maximum size with phenomenal hydrotherapy. The LSX 900 offers the very best without compromise.