The U.S. Divers® Cabo fins are excellent for novices and experts alike. Dual composite, vented blades provide efficient kicks by reducing strain and conserving energy. An optimal flex zone position is engineered to increase power and enhance efficiency, and a soft, comfortable foot pocket contains adjustable straps for a finely tuned fit.
My 10 yo daughter used these on our snorkel trip, and they held up great (snorkeled every day for a full week). She didn't have any issues keeping them on with bare feet. Usually you would wear open heels with dive booties. But, we were not able to find her size in closed heel fins. The closest ones just didn't fit as well as these. So, we gave these a try. The held up well with no issues at all. It's possible that an adult may have a different result, with their stronger legs, which may result in your foot trying to peel out of them. She didn't have that problem. Since her feet are still growing, I am happy with the choice we were sort of forced into. It turned out well, and they should hold up until she can no longer wear them due to sizing. The rest of us used the US Divers closed heel fins sold here at SA and loved them. No issues at all with them trying to come off. great fins for the price (closed and open). probably would still recommend a closed heel for normal snorkeling though (as will most any dive shop).