Adjustable fin made of three different materials with powerful and comfortable Multi-flex power jets Flexible vent concept gives full power to negative area without stiffening the blade. Spring effect of blade created by original design of side rails. ‘Scoop’ effect obtained at tip of blade by use of ultra flexible materials and specific design. Weight reduced to a minimum due to an original design and the use of extra light and efficient materials. Size EU S/M 38 - 41 M/L 41 - 44 L/XL 44 - 46