I was looking at creek company and theirs has a heavy nylon outer with the inner inflatable bladder.I know the best are the seamless,or welded seamed pontoons.But i just wanted to know what was wrong with the double layered pontoons like the creek comp.,I was also looking at the heavy pvc material pontoons,is there any drawbacks with the heavy pvc vs. the heavy nylon covered bladder by creek comp.it seems like it would be harder to punchure the nylon covered bladder.My father just got a used creek company and the only thing i saw that was wrong was the steel frame was rusting and chipping,aluminum does seem the best.