You sit in the dedicated Moto-Massage® seat; the jet pattern moves; the result is a sweeping back massage rather than a fixed-point pressure massage.
The "DX" designates the dual-stream variant, two streams of water sweeping simultaneously up and down the back. The single-stream variant, called simply Moto-Massage® without the DX suffix, is the affordable-tier version on the Hot Spot® SX and TX.
Moto-Massage® DX is a moving-jet pattern that no other brand offers, the patent covers the moving-jet engineering, and Hot Spring is the only Watkins Wellness brand or hot tub brand more broadly that carries it.
