Combining features such as special blade curvature and varying the degree of flexibility and structural ribs produces positive forward thrust with spring-like effect.
The open vents efficiently channel the water flow to give added energy saving effect.
Compatible with stainless steel spring fin-strap (FS11).
Large: UK 4.5-6.5
XLarge: UK 7-8
XXLarge: UK 8.5-11
XXXLarge: UK 11.5-13