I ordered the product as I can get bad blisters/sores on my toes if using my fins frequently during a swim session. I've used once but was slightly disappointed in how quickly they felt they would come off my feet. I was doing sprints with fins and I have admittingly narrow feet, which have quite a bit of slop in the fins. They did help hold the fins on better but after pushing off the wall, I could feel the ends start to slide. For others with narrow feet or having slop in the fins, I'd recommend something that goes over the entire foot.