When they said swift water I thought I would give them a try being I spend time on the beaches of the Gulf of Mexico and the beaches on Kauai HI.
Received these the other day 3 days early they look great and feel wonderful on the foot. Size wise Im an 11 and they fit perfect if you were an 11.5 myself I would have ordered a 12 because I don't want my heal over the back of the Croc.
This pair and the other pair I ordered both have the adjustable back strap which makes them fit great.