With the Northwave Extreme GT 4 Cycling Shoe, we are provided with the comfort and stiffness we need for our training rides on the road. Its morph carbon 12 AAS sole and 100% carbon fiber insert offer a stiffness index of 12 to ensure every watt we push into the pedal counts. Northwave incorporated the double SLW3 dial for a secure closure, allowing the rider to adjust each area individually for guaranteed comfort and an even distribution of pressure across the foot.