Poly Urethane (PU) -
Models with suffix U
Polyurethane is unbelievably tough and is the strongest boat material available. It is weldable for construction - which means there is no glue to deteriorate - and yet easily repairable with glue. PU has better properties than any other inflatable boat material in all categories except fold ability (Hypalon is easier to fold).
Polyurethane can be alloyed with PVC, and Incept offers an option of a 50/50 blend for raft sponsons, gaining a saving in cost without sacrificing all of the advantages of polyurethane's toughness.