Suunto 9 Baro is designed and built to meet the needs of the most demanding athletes and adventurers. Like all Suunto watches, it has been thoroughly tested by Suunto’s internal testing team and athletes all over the world, with thousands of hours of real use in the toughest conditions. Suunto 9 Baro has also been tested against US military standard 810H and passed several tough tests including extreme temperatures, shock and drop, sand and dust, humidity, and freezing rain – so you can rely on it to confidently see you through any adventure!