At MAKO Spearguns we pride ourselves on producing some of the highest quality freedive fins available. These freedive fins have fixed blades (permanently attached to the foot pockets) and are very good quality freedive fins. The foot pockets are made of the same thermoplastic rubber used in high end foot pockets. These foot pockets are soft for comfort where needed, but stiffer where needed for increased transfer of energy. The blade is made of a highly flexible yet strong Polypropylene composite material, designed to maximize thrust and stability. This is no cheap, off the shelf, fin found at sporting goods stores. These are probably the finest entry level dive fins available. Available in three sizes: Size 6-7 Size 8-9 Size 10-11 Size 12-13