Review (5/5): It works!  Non-kink oxygen tubing.
People who depend on portable oxygen will know how difficult it can be to find tubing which does not "kink"--tangling in on itself, blocking the air-flow, and really becoming a nuisance. The manufacturers of this product describe it as "non-kink" and they tell the truth. It is refreshing to find tubing which behaves itself, even when extended to the maximum medically recommended length of 50'. When, after a while, it does begin to tangle, it's time to turn to new tubing anyway. I was skeptical when ordering this, but it really does work.