Saw reviews about kinks. I have yet to see one of these tubings that didn't kink all the time, so more important to me is the ability of the hose to provide the required oxygen supply despite what looks like debilitating kinks and this one sure seems to continue to perform as designed. Plus, I did not see any "kink free" claim by the seller, so I couldn't hold that against them in the review.Works as shouldRight Items!I have purchase this item 2-3 time. The last couple of times the tubing had a deep crease in 1-2 areas on the tubing.So I returned 2 of the 3 Oxygen tubing.I like the green tubing cause its soft and doesnt kink.Tubing is great for folks whose insurance is being a pain during the Pandemic. It seems that pricey to me but, it does help me breathe again, so there’s that.just what was needed for my o2 concentrater.Does the jobArrived quick. As described, price good