Transiro R4 Men'sFor sprint or short distance triathlon formats, where every second shaved off in transition matters, we wanted to deliver a shoe that could offer the fastest and most intuitive closure system possible. Powerstrapis extremely quick to fasten: simply slide into the shoe, pull and roll out from the transition smoothly. SPECIFICATIONS Mesh and Microtex upper: enhanced ventilation with the needed support R4 carbon injected nylon outsole: moderately stiff