Seac Motus Fins
Model: fin with interchangeable blade and closed shoe in two materials • Shoe material: in double dual-density material Hard thermoplastic rubber for the sole and ribbing, soft for the shoe so as to optimize the comfort/performance ratio • blade material: special technopolymer with a formulation focused on the flexibility and reactivity of the blade.
These pockets are soft on the top and sides for comfort and hard on the bottom for energy transfer. The tendons are softer than most meaning more reactive blade materials such as fiberglass and carbon will not be restricted.
Seac has a size conversion chart for US sizes but it is so wrong we aren't going to list it. Call if you want a measurement. I wear a size 8 US and the 39-40 fits me the best.