Damselfish
Contributor
I think you're putting bandaids on top of bandaids here and the solution is to get your own fins that fit properly. Especially if you've had problems before, you may just have some of those uncooperative feet that want to be treated nicer. If you're relying on random full foot rental fins you will never be sure you're going to wind up with something you're comfortable in.I am fairly new to diving. I have had bad blisters in the past from ill-fitting borrowed full-foot fins. Last dive trip I bought neoprene booties. They are much better but after several dives I still got a bit of chafing along my heels where the seams run along.
Often booties don't fit that well in full foot fins, or make then a little less secure because the thickness of the sole is pushing your foot out from where it should be. Full foot fins are a good place for socks alone, if you need them. Booties are better with open heel fins.
Full foot fins can be nice if you're only doing boat diving and they're generally lighter and cheaper. They're common rentals exactly because they're cheaper and customers don't (theoretically) need booties too. But open heel fins with booties are more versatile, much better if you so any sort of shore diving. I suggest buying open heel fins unless you want to wind up with a couple pairs of fins (which is ok too.