I purchased these fins four months ago and based my purchase on the reviews for this product.  I have used them with my float tube on five separate fishing trips.  My first trip they seemed to work fairly well, but on subsequent trips became increasingly disappointing.  The strap releases, which are typical cheap plastic clip types, began to release while in use.  The first time it happened I nearly lost the fin (they don't float of course) and I was fortunate enough to catch it before it sake to the bottom of the lake.  Last week (my fifth and last trip with these fins) They released five times because the rubber (flubber) straps kept come out of the plastic clips.  Being constantly concerned about whether or not you fins are going to come off is no fun. At the end of the day while I was return from the far side of the lake I felt a strap let go and rather they try to reattach it (again!) I limped to shore with one fin. As I pressed the releases on the remaining fin one of them broke.  These fins are poorly designed for float tube fishing.  The rubber stretches with use until they become useless and the plastic clip attachments are easy to clip on but are not strong enough to last beyond a few uses.  These may be adequate for scuba diving, but they DO NOT serve the float tube fisher.  If I could return them now I would.  Unfortunately the return period often doesn't provide for actual use of a product and customer dissatisfaction.  Don't waste your money or precious fishing time on this disappointing product.