hello i got into freediving about 2 years ago and at my local dive spot is
dutch springs pa and the water temp drops about 10 degrees every 10 feet so at 40 feet its about 54 degrees what kind of fins can you were scuba diving boots with………..

Open heeled fins with either an adjustable or elastic strap. When you buy them make sure to take the boots that you are going to be wearing to size them otherwise the fin may squeeze the sides of your foot, and it becomes very uncomfortable after a few min.