I dislike PVC made tubes.
There was a lot of data and testings about thme and they say that they are the same if not better as Hypallon. So far with the boats we have it looks like the PVC does not like direct sunlight.
We have the proof. We have 2 year old 640SR that has been uncovered all year for 2 years running and has been in the sea for all this time the tubes need changinging immediately.
Our 2 year old 700RSR is been kept under cover all the time and in the water with no cover for 2 months in the summer. We believe that the tubes will last for another two may be three years if they do not get much use.
Hypallon tubes I would like