If you're looking for a hassle-free large hot tub, then you'll want to read this Wave Osaka 6-person Rigid Foam hot tub review. This mid-price-range hot tub is somewhat unique in the hot tub world, with its rigid foam outer a step above the usual inflatable hot tub at the budget end of the scale, but without the commitment, expense, and installation stress of a static resin hot tub.
Instead, Wave's Osaka hot tub is self-assembled using lightweight foam panels that create a rigid outer wall. This is finished with a faux-leather PVC outer that makes the whole thing look far more aesthetically pleasing than the usual 'giant paddling pool' look you get from an inflatable hot tub. It also means that you can still benefit from the portability and have the ability to dismantle and store the hot tub if you don't want it in use all year round.
