Sidi MTB Dragon 3 SRS Carbon Composite Vernice Shoes 2014 Soft Instep 3 Closure System for micro adjusted fit MTB SRS Carbon Composite Sole for easy and convenient sole replacement Tehcno 2 System for upper shoe fit adjustment Adjustable Heel Retention Device reinforces heel cup for better fit during high movement moments Sidi Heel Cup for added durability and stable footing