The steam sauna is made of high-quality ultrasonic pressed cotton fabric, heat insulation, highly sealed, can effectively prevent heat loss.High quality metal frame support whole sauna tena,let is more sturdy.The portable steam sauna has a capacity of 4L steam pot and can be used for 120 minutes when filled with water. Steam can fill the whole sauna tent 360° in a short time.3 layers of insulation waterproof fabric.The home sauna takes about 8 minutes to warm up and it hits about a minimum of 99℉.