The Relax portable sauna is not like other saunas. It doesn’t rely on ambient air heat, glowing light panels, or vague claims about “infrared wellness.” It’s a medically-recognized FDA approved device, powered by a patented semiconductor chip that emits pure far infrared light in the precise 7–14 micron range — the exact frequency where water molecules in the human body resonate most effectively. This range isn’t arbitrary — it’s biological truth. It’s the band shared across humans, mammals, and birds — a window of infrared absorption where energy becomes action at the cellular level. While traditional saunas heat the air and wait for the body to catch up, the Relax Sauna excites your internal water clusters directly, generating measurable thermal movement within minutes — no long preheat, no wasted time. And here’s what truly sets it apart: The Relax Sauna reaches the 20 W/m² power density required for medical-grade FIR therapy in just 3–4 minutes — and sustains it. Most saunas never reach that threshold. Others spike and fade. Relax stays consistent, session after session.