* Caliper Buckle two-way ratchet for easy on-bike adjustment with incremental tightening and loosening.
* Soft Instep 2 Closure System distributes pressure along the instep. Soft Instep Closure is replaceable
* Synthetic upper is water repellent, quick-drying, breathable, permeable to water vapor and abrasion and mildew resistant.
* Sidi Heel Cup stabilizes and supports the heel to reduce heel slip and increase power transfer
* Millennium 4 Carbon Composite Sole features injected carbon fiber in a matrix of Nylon, providing more rigidity than a standard nylon sole.
* High Security Velcro strap
* Replaceable Heel Pad
* External, reinforced heel cup for superior fit and power transfer; won’t break down over time.