T-5 air Perforated Politex upper Carbon Composite 20 sole Velcro closure Replaceable anti-slip heel pad Sidi heel cup Stiffness sole 5.7 Ventilates triathlon shoe to wear in a blink. Thanks to the upper that absorbs water without losing stiffness and the quick and comfortable fastening, this product is suitable for giving your best during triathlon competitions. Its innovative closure is strategically positioned outside the contact areas with other riders to manage crowded situations better. The heel structure is adjustable, allowing the shoes to wrap around the foot quickly. Made for professional and all-around athletes. Built to last. It's a Sidi. Great products last over time, period. This is why we select the best materials and make all parts interchangeable, so you can keep your beloved one as long as you want. Built to last. It's a Sidi. Great products last over time, period. This is why we select the best materials and make all parts interchangeable, so you can keep your beloved one as long as you want. The partner for triathlon competitions Superior ventilated upper The perforated microfibre allows ventilation of the foot that gets wet after the swimming competition. It favors drying while pedaling and allows excellent aerodynamics. Close it firm Quick and comfortable fastening with velcro ensures solid closure and time-saving. Give your best Suitable to give the best during triathlon competitions, the carbon-fibre injected nylon sole is perfect to combine stiffness and softness thanks to it's stiffness index at 5.7 and to maintain the technical characteristics unchanged over time.