Extra Force Fin^® 
Take control with the world's first variable-thrust fin! 

FOR...technical and commercial divers, or anyone who likes maximum power and control. 

Comfort & Safety— Toes-free foot pocket reduces cramping and leverages power form your strongest kicking muscles.   
Efficiency— Strong kicking muscles are best suited for powering a fin blade that is moving a high volume of water to the rear at a fast rate. 
Stability— Sculpted trailing edges and Vortex Generators^TM accelerate the water in your direction of travel.  Add a set of Force Wings^TM for utlimate tracking and control. 
Thrust— When you rotate the Force Wings^TM inward, you channel the water to the center and to the rear, accelerating it and creating a ramjet effect to catapult you forward. 
Colors— Amethyst Purple, Sapphire Blue, Ruby Red, Emerald Green, Amber Yellow, Smoke Black& Opaque Jet Black. 
Accessories— Comfort Instep^TM Cushion for a perfectly cushioned fit.   Force Wings^TM for variable thrust. Elastic Bungie® heel strap with Comfort Heel Pad and easy grip knob.