Sidi Genius 5 Narrow Fit ShoesSIDI needs no introduction when it comes to serious performance and serious comfort for serious riders. The Sidi Genius 5 Narrow Fit Shoes is loaded with features and is everything you'd expect in a pro-level road shoe. It starts with the Carbon Composite Sole(R) for the kind of stiffness that transfers power right into your pedal strokes. The Caliper-Buckle two-way ratchet system makes it effortless and convenient for you to make on-the-bike adjustments with incremental tightening and loosening. The external reinforced heel cup stabilizes and supports the heel, with an anatomically shaped plastic design that keeps its figure, reducing heel slip and optimizing power transfer for when you need to crank out the wattage up those switchbacks or sprinting to the line. FEATURESCaliper Buckle two-way ratchet for easy on-bike adjustment with incremental tightening and looseningComposite Sole(R) features injected carbon fiber for efficient power transferSoft Instep Closure System(R) and padded tongue eliminate pressure pointsSoft Instep Closure System(R) is replaceableHigh-Security Velcro(R) won't shift or slipSynthetic leather/Nylon upper Breathable, supple and durableTechnomicro composite microfiber upper is water repellant, quick-drying, breathable, permeable to water vapor and abrasion and mildew resistantSidi Heel Cup stabilizes and supports the heel to reduce heel slip and increase power transferSPECIFICATIONSUpper MaterialSynthetic leather/nylonClosure typeDial/VelcroOutsoleCarbon Composite SoleIntended UseRoadSpecial FeaturesHeel Cup, Soft Instep Closure System(R), and padded tongueUS - MenEUROUS - Women63976. 539. 57. 574087. 5418. 75841. 598. 542. 51094310. 59. 543. 5-1044-10. 545-1145. 5-11. 546-1247-1348-1449-1550- | Sidi | Genius 5 Narrow Fit Road Bike Shoes Men's | Size 40 in Black