- The Soft Heat Sauna is the ultimate portable infrared sauna. Featuring soothing radiant heat at safer, more comfortable temperatures than conventional saunas, making breathing more pleasant. In the Soft Heat sauna, the radiant heat is being absorbed by your body over 1 1/2 inches below the skin, giving pain relief for those with sports injuries, fibromyalgia, arthritis, and other chronic pain ...www.infraredsauna.net