I have two made by Fend-Aire, which is part of Subsalve, a company located in Rhode Island. They make lifting and salvage bags for divers and the military. Best fenders I have ever seen, but the makers are hard to get on the phone. They are made out of Hypalon and inflate with a dinghy pump and Halkey valve. Love em, they are much better than anything else. I have retired all my Taylor fenders etc. Don't need em.