Empty vs. full hot tub
People are more prone to buy a model that feels comfortable when they sit in it empty on the showroom floor so manufacturers design their tubs with that in mind.
But everything changes when it’s full of water. Due to buoyancy, you don’t feel the same pressure points where your body is contacting the tub as when your full weight is pressing down.
So what may feel uncomfortable in an empty tub may actually feel quite nice when full. But if they’re poorly sculpted, hot tubs can be uncomfortable no matter what