All new upper featuring Sidi's proprietary Techpro eco-friendly synthetic leather The new tongue is vented for maximum breathability Utilizes Sidi's Tecno 3 Push Dial Adjusters for a perfect fit High Security Velcro for a precision fit across the toe Sidi Twelve Carbon composite sole for the perfect blend of stiffness and all-day comfort Replaceable Heel Pad All new heel cup provides great heel retention and saves weight over previous versions New Soft Instep 4 instep closure is sleek and light and combined with the padded tongue provides exceptional comfort