Typically, the more rigid the fin the more power and acceleration it will deliver with more effort. Additionally, the opposite may be true when utilizing a less rigid fin design resulting in less power and acceleration requiring less physical exertion to maximize the fins performance.
Those fin socks with prevent you from bruises, cuts and cold if you wear full socks. Watch out, you may have to go for a bigger fin size if you are already tight without fin socks.
There are different types of fin savers in order to avoid losing your bodyboard fins. The simplest ones are the fin laces. You also have classic fin tether that are possible the easiest to use. More recently, we’ve seen the invention of the fin saver straps. They maintain the swim fins on your feet at all times while increasing the comfort of the fins on the heel straps.