C
Curtis Knopp This fin has the perfect amount of stiffness. I'd say it's about an 8.5 out of 10 on the stiffness scale (if 10 were the most stiff it could be). It's great because it's stiff enough for the thrust you want, but it's still really comfortable. Foot pocket is also nice and wide for comfort. These are a 5 out of 5. If they floated, I'd give them a 6 out of 5!!!