over the years the quality of fins have increased as well as the number of options of what the material of fins are made from. there are many materials that fins are made from.
The materials that they are made from include rubber, plastic, carbon fiber or combinations of all of these materials.
Although these are the most common forms of material for each fin, many people have a preference in how ones likes to wear their fins to change the style of their swimming.
Some swimmers may have a goal in their swimming such as to burn more calories, strength train or increase swimming endurance.
When a swimmer has a goal in mind, he or she may decide on which materials in a fin are more helpful in achieving that goal.