MAXAR Bio Magnetic Airprene Knee Brace Open Patella, Terrycotton Lining Black w Red Trim RemZzzs The non magnetic clip version provides 2451095 The non magnetic clip version provides the same AirFit F20 mask design and features without magnetic headgear clips 123 ft FAA Approved Yes FAA approved label visible on device Oxygen Concentration Purity 87% 95% at seal level at all settings Warranty 5 Years (1 Year on Pre Owned Units)Please note Any smoking while using the unit or evidence that unit has been used in a smoke filled environment will void the warranty ● Provide uniform all way stretch compression and support for all day comfort Reinforced padded patella opening eliminates direct pressure and stabilizes the kneecap