Sidi Five CC Road Shoes Sleek lines & classic looks in the Sidi Five catch your eye, & Sidi's high tech materials & hand made Italian design & construction mean these shoes deliver greater comfort & performance on long rides, which is why they are used by many pro riders. As with all Sidi shoes, all small parts are replaceable so the useful lifespan of the shoe is far longer than other brands. Carbon Composite Sole: Stiff & light weight for ultra-efficient power transfer trough the body of the shoe & thinner in the toe section to allow a degree of flex to reduce the adverse effect on bloodflow & thus enhance comfort over a long distance. Perfect for maintaining performance during long road races, sportives & epic club runs. The carbon itself is a composite injected into a high grade Nylon matrix that will not absorb moisture or lose rigidity with age of adverse conditions. Soft Instep 2 Closure: Sidi's original wide, anatomic strap has been reduced in width but coupled to a soft, padded backing fabric to increase comfort & apply a more even pressure. Caliper Buckle: Micrometric adjustment when the shoe is on & fastened, so you can make small adjustments to tighten or loosen the shoe as you ride. Velcro Security System: Very high quality hook & loop closure with carefully crafted interlocking polymer teeth so that there can be no movement of the straps when they are closed Replaceable Heel Cup: As with the buckles & small mechanical parts, the heel cup is also replaceable, so as it inevitably becomes worn over time it can be renewed & your shoes lives on.