ReOxy® is a new breathing therapy medical device. Treatment using reduced and enriched oxygen gas. Mixtures – Interval Hypoxic Hyperoxic Treatment (IHHT®) that leads to more efficient transport and utilization of O2 by body tissue. Method based on more then 10 years of research and clinical trials. Non-pharmaceutical treatment with minimal side-effects. Unique solution for elderly/senior patients and patients with reduced physical abilities.