Summerlin Las Vegas Infrared Sauna & Cold Plunge, Whether you're looking to enhance your athletic performance, remedy a nagging ailment, or simply seeking a new way to relax your body and mind, Sweat It infrared sauna suites are a perfect solution. Using infrared light, a Sweat It sauna warms your body better than a traditional sauna. The rays penetrate soft tissue while raising your core temperature, which encourages detoxifying sweat and helps muscles and joints recover and heal more quickly