The Relaxer uses a pillow-back design with 4 cushions to provide the ultimate in support while you also receive the benefits of zero gravity technology. Zero gravity technology allows the legs to be elevated above the heart which creates an open angle between torso and thighs. This helps relieve pressure on the lower back because your back is in the correct resting position. Another benefit of this positioning is easier breathing due to lung capacity expansion, created by the opening between the torso and the thighs. This position also helps improve circulation and minimizes stress on the heart.