So am I and I'm totaly lost by the types of materials from which they are made.
I found this site which has helped me a bit.
It might help someone else as well so I am posting the link. http://inflatable-boats.com/
HYPOLON ment to be the best,,,,,well from what ive been reading,,,im new at this after just buying an inflatable ,,,ZODIAC,,,AVON use it,,,ive been told that the pvc rubber ones are made better these days,,,and the one i got is well sturdy ,and quite tuff ,only been out once ,but going out with the outboard next time ,,,loads on e bay ,,,if u like auctions,,,THAT IS A GOOD SITE AND EXPLAINS IT ALL,,I HAVE KEPT IT FOR MY FAVORITES,,,IT EVEN SHOWS YOU HOW TO FOLD THEM UP PROPERLY ,,,GOOD LUCK ,,TIGHT LINES