CRUSH AND KINK RESISTANT - The crush and memory-resistant tubing are great for use while sleeping because you don't have to worry about restricting your oxygen flow when laying on the tubing. SIX CHANNEL TUBE DESIGN - Our Mars Wellness 6 -channel inner lumen design providing an uninterrupted flow of oxygen that provides maximum safety for the patient PREMIUM QUALITY MATERIALS - Manufactured from latex-free quality materials which resist cracking and tearing. When uncoiled, tubing lies out straight, minimizing "torque" or pull on the cannula. UNIVERSAL TUBE - These tubes can be used for standard oxygen therapy and come with standard connectors which are compatible with all major oxygen therapy brands. Mars Wellness oxygen supply tubing has a 6 channel inner lumen design providing an uninterrupted flow of oxygen that provides maximum safety for the patient