I have taken a pair of the Caddis style fins and cut them off two inches beyond the toe of my wading boot. I also put felt on the heel of the fin. When I am floating a river like the Yak where I know there is relatively small chance of an unforseen hairy situation I wear them to manuever the boat for casting purposes. I don't use them for propulsion or major moves, just to keep the boat positioned for casting effectively. When they are not being used, FEET UP!!!! When using them I still don't keep my feet much under the water...It is not the safest thing in the world, but I'm carefull and use them in small doses...it works for certain situations.