Sidi's Genius Fit Carbons are specifically engineered with efficiency and comfort in mind. The breathable and supple Technomicro uppers cradle you in comfort and are tougher than leather. And, Sidi's Arch Compression Straps, Caliper buckles and Velcro straps offer easy adjustment and a custom fit, while the padded tongues complement your comfort. Plus, Sidi's Millennium 4 soles deliver awesome power transfer and keep these great shoes nice and light. Get the Genius Fit Carbons and your feet will thank you for years to come.