I have to go back to my web history and look it up. I was doing some research on the Chemical components of Ropelene and I found a few interesting articles on it. I also have a friend who works for Dupont Plastics. He is also researching it for me. It really bugs me that I can't get a straight anwser from Triumph. Their Bubba video's are all well in good, but no where does it say how long this plastic will last. Whats so great about a life time warr on a hull if you need to go back every 5-10 years and get a new one