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. Microfiber upper construction. Soft TPU and mesh front flex area. Full-length suede microfiber panel on inner side of the boot. Heel and shin ventilation. Internal bio-mechanical ankle brace. External TPU shin protection wraps around to outer calf. Replaceable nylon heel plate slider. Hook and loop zip pull lock. Micro adjustable ratchet top closure. Lightweight rubber compound sole.