Salter Labs Elongated High Concentration Non-Rebreathing Mask, with 7' Three Channel Safety Tube and Safety Vent, Elastic HeadstrapPartial re-breathing model or non re-breathing model, with and without safety vents. A transparent mask with soft anatomical shape, ideal for long term and edentulous patients. Aluminum nose clip aids in a comfortable fit. A reservoir bag and different one way valve configurations make this available as a partial re-breathing mask. Over-the-ear or elastic head strap style. Three-channel crush-resistant tubing standard on all masks. Another Salter exclusive.Transparent mask with soft anatomical shape.Three-channel safety tubing.Precision check valve on non-rebreathing mask.Adult mask in over-the-ear style A Salter innovation.Wide, adjustable elastic strap also available.Assures proper oxygen concentration.Fits comfortably below the ears to hold mask snugly in place.