PreciseFlow is adjustable for altitude flown. It works with a dual lumen cannula.û

By now, the aviation press has shilled the use supplemental oxygen to the point that pilots are practically breathing the stuff recreationally. Climbing above 4000 feet? Good grief, you’ll need oxygen. Feeling tired? Here, have some oxygen. Night touch-and-go practice? Pass the cannula, please.

We like breathing as much as the next guy but this has gotten ridiculous. What’s even more ridiculous is how inconvenient the use of oxygen still is. Cannulas are bulky and uncomfortable and they clutter up the cockpit. They’re also wasteful of oxygen that can be both difficult to find and expensive to buy when you can find it. …