note I think NOC will supply all gear
if you are taking a class with them. Unless you are SURE you want to kayak whitewater use their stuff. In general, you won't really know you are sure until that first time you go down a rapid upside down with your head banging off rocks on the bottom. That experience seems to shake quite a few newbie's out, but if you are still in it after that chances are you'll stick with it.
note rocks