Solocarbon technology - the ONLY far infrared technology with emissivity study and clinically shown to be effective in improving blood pressure, increase core temperature, aid in weight loss and waist circumference -Solocarbon® far infrared technology proven effective with 95% emissivity. -Environmentally approved for safety with 3rd party study. -Ultra-low EMF technology -Magne-seal assembly process offers much more than easy set up -Beautiful craftsmanship and solid wood construction is made to last a lifetime. -Larger Interior space and deeper benches for ultimate relaxation.