ditto KENGORE. At the Deso put in I had a buddy who had a few PFD's that looked just like ours but were listed as 'for waterskiing'. They were all rejected. The ranger said that they would allow them 'this time' if we took a strap and attached it so that it went through the legs, and kept it snug. I have seen this auto inflate type before and I am nearly positive that they would not pass muster with a ranger. If the auto inflate does not work then you have to blow it up manually. That is impossible in whitewater. In the description it even says, 'perfect for a day out on the lake.'
May the wind be always at your back,
May the sun shine warm upon your face.