PortaSauna UK tents are constructed using Oxford 210D cotton, which is rated to withstand temperatures up to approximately 150°C, ensuring they remain safe and chemical-free even at the sauna’s peak temperature of about 100°C. The windows are crafted from high-performance TPU, suitable for high temperatures. Our saunas undergo rigorous testing with high-quality, calibrated equipment to ensure safety. Test results demonstrate that at 110°C, the air inside PortaSauna remains free of carbon monoxide and volatile organic compounds. Additionally, the interior layer is made from CPAI84 flame-retardant material, adding an extra layer of safety.