This nasal cannula is designed for use with oxygen concentrators and other medical oxygen therapy devices. It is made of soft medical grade material, which is comfortable to wear and can effectively prevent skin irritation. The nasal cannula is 7 feet (2 meters) in length and can be adjusted to fit most people. It is suitable for use at home, in hospitals, or during travel. The nasal cannula is easy to use and can help improve your quality of life during oxygen therapy. It is an essential accessory for anyone who needs to use medical oxygen.