An interchangeable blade which is very lightweight and reactive and also well-adapted for the most demanding of free-diving use. Thanks to its speci?c and exclusive design, it's more propulsive when passing through the leg-kick, which gives an optimum return of the blade. The foot-pocket is very comfortable and comes in a composite material : soft rubber around the foot arch, and a rigid part along the sides and traction surface. It's ample ? ttings easily allows it to be worn with diving socks.