OxyMask is the "One Mask" from admission to discharge! The ONLY mask that can supply oxygen at low flow. This mask works great for patients that use oxygen concentrators. Flow Rate - 1 liter per min. - 40 liter per min. FiO2 - 24% to 90% This unique product can be used to replace Nasal Cannulas, Simple Masks, Partial Rebreathing Masks, and Non-rebreathing Masks. OxyMask's logical advantages: The only O2 therapy device to deliver FiO2 of 24%-90% Can be utilized to deliver High Flow O2 Therapy up to 40L/min. Eliminates CO2 rebreathing. Allows open communication with the patient. Designed for nose and mouth breathers. Convenient swivel elbow to reposition tubing. Naso Gastric tube can be threaded through OxyMask. Allows for suctioning & oral care through the mask First Open Oxygen System - patent pending Product User Manual Oxymasks come in 3 different sizes. Standard, Large, and Kids The Standard and Large Oxymasks (25% larger than standard) come in 2 options: Single string behind your head Dual strings that go behind the ear The Kids Oxymasks come in 1 option: Single String behind your head