Durable and technical microfiber upper construction. Front flex area is constructed with soft TPU over-injected on breathable mesh for improved abrasion resistance. Full-length suede microfiber panel on inner side of the boot provides excellent grip and feel against the bike and protects from abrasion and heat. Strategically positioned ventilation in heel and shin. Separate internal bio-mechanical ankle brace. External TPU shin protection wraps around to outer calf to spread and dissipate impact energy. Replacement clip on shin slider improves protection, while the vented section promotes airflow into the boot. Replaceable nylon heel plate slider protects from impact and reduces friction in the event of a crash Hook and loop tab lock the zip pull closed, keeping it flat and secure. Micro adjustable redesign ratchet top closure stows tab end.