More information: www.d1spas.com Whats the most important part of a hot tub? You! With that in mind, the human bio-mechanics design team at Dimension One Spas applied the principles of Hydronomics to develop exclusive no-float seating angles that keep you pleasantly, pleasingly in your seat instead of aimlessly, randomly drifting about. BioForm Seating and the science of Hydronomics that lays at its foundation also provides you with optimized body positioning, full body immersion, ideal jet and jet-control placement and the correct sizes and types of jets.