GR SYSTEM D.O.O.  is a leading developer and manufacturer of cutting-edge medicine devices and trainings for hypoxic-hyperoxic training, specifically the OXYTERRA RS, and related recreational devices across Europe. Our innovative solutions help people improve their overall health, enhance quality of life for older clients, boost endurance and performance for athletes, and offer business owners a valuable tool to increase profits and expand their service range. Our main goal is to provide people with non-invasive, natural methods of strengthening their bodies and minds and prolonging their active longevity. The flagship product, the OXYTERRA RS device, differs from other systems on the market due to its unique technical characteristics.