Alpinestars most iconic riding boot, worn by a roster of champions past and present, the Supertech R has undergone a series of evolutions to significantly ramp up its performance features even further. Innovations for 2015 include a newly redesigned compound rubber sole, an update to the ergonomically profiled shinplate and a redesigned front flex area – all of which enhancing the podium winning performance of this CE certified boot. Construction Durable and technical microfiber upper construction offering superb levels of flexibility. Microfiber main shell offers high levels of water-resistance, durability and improved weight-saving. Material ensures consistent fit for long term usage and is easy to maintain and clean. Redesigned front flex area constructed from over-injected TPU on breathable mesh with shaped reliefs. Newly designed external TPU shin protection is ergonomically shaped and wraps around to outer calf and is engineered to spread and dissipate impact energy across the surface while remaining compact. Shin plate features new micro-adjustable ratchet top closure for safe and precise fit. Innovative, full-length medial-facing microfiber panel features new texture patterning offering excellent grip and feel against the bike and protects from abrasion and heat. Lightweight rubber compound sole has been redesigned to offer excellent grip and feel. New, soft TPU stretch panel on lateral side gives easy closure with excellent fit. Zip is made from TPU to reduce friction in the event of a crash. Velcro tab locks the zip pull closed, keeping it flat and secure. Integrated replaceable co-injected TPU/Aluminum toe slider features new easy screw fixing concept provides feel and protects the outer toe box structure from abrasion. Flexible accordion microfiber stretch at Achilles allows natural movement and support. Top gaiter follows leg contour and is made of flexible high-grade synthetic leather reinforced with PU. Flexible, lightweight toe shifter allows feel while changing gears. On vented version: strategically positioned ventilation in heel and shin TPU guides air through the boot. Separate internal bio-mechanical ankle brace works with the outer structure of the boot to form a protective system allowing full and free movement of the foot, ankle and leg. Replaceable polymer heel plate slider protects from impact and reduces friction in the event of a crash. External entry has stretch accordion panel for a close fit and ease of entrance and removal. The Supertech R boot is CE certified to EN