Freediving fin design is more specialized than most divers expect. Unlike scuba fins, freediving blades are long and soft - built to generate forward propulsion with the slowest, most oxygen-efficient kick cycle possible. The material (plastic, fiberglass, or carbon fiber) determines how the blade flexes and returns energy to your stroke.
Use the guides below to understand what separates blade types, which foot pockets fit most people well, and where to start depending on how serious you plan to get.
6 guides on fins.
Quick Fin Selector
Just Starting
Plastic blade fins in the $60-120 range. Cressi Reaction or Mares Razor. Easy to learn the kick cycle on without cringing at the price.
Intermediate
Fiberglass blades, $150-300. Noticeably more efficient than plastic. SEAC Motus or Cressi Gara Modular are solid starting points.
Serious Depth / Competition
Carbon fiber, $300-600+. Maximum energy return, minimal effort at depth. Molchanovs Flow or Omer Stingray are worth the investment.