A class-leading, low-cut performance riding boot, the SM-1 R v2 Vented Riding Shoe incorporates a host of technical innovations for improved levels of comfort, fit and durability. Constructed from a lightweight and abrasion-resistant microfiber upper with extensive perforations for maximum airflow and breathability, the shoe is also equipped with strategically positioned TPU protectors for abrasion resistance in a key area. The SMX-1 R v2 Vented Riding Shoe also features a rubber compound sole with superior grip patterning for excellent grip both on and off the bike, while the accordion flex zones give support and control regardless of your riding position., Rear flex bellow is equipped with a flex window, which also acts as an air intake for effective ventilation and airflow , Innovative heel counter support system, which works in conjunction with a strap closure to offer improved fit and support, as well as structural integrity, Rear of heel counter has been designed with soft TPR insert which works seamlessly with the rear flex zone to allow for improved freedom of ankle movement and comfort on the bike*s controls, New ergonomic TPU shift pad for enhanced durability in a critical area, Ergonomic boot shaping for forefoot streamlining which offers wide-ranging foot profile fit and comfort., Evolved closure strap is anatomically angled to follow natural shape of rider*s instep, Instep and Achilles* accordion flex zones are constructed from lightweight microfiber for optimized levels of durability, comfort and maneuverability on and off the bike, Front Velcro? closure system offers a quick and secure fit over the instep area while permitting excellent levels of flex , Alpinestars exclusive compound rubber sole with grip patterning to promote improved feel and grip water dispersion and durability, Strap features TPR puller for ease of use, Sole features integrated Alpinestars TPF (Transversal protection Frame) to protect against possible transversal loads, Aramidic fiber wires ensure the new strap closure system is durable, thin and lightweight, Integrated, replaceable bi-injected forefoot slider, Thermowelded flex grooves to control the flexion and flexibility of the shoe; instep, medial and back , Double density ankle protector on both sides layered under the upper offers protective performance and abrasion resistance in key area, Reverse zip closure ensures convenient in and out, External, high modulus TPU heel counter, lateral ankle and shift pad for improved shock protection and durability., TPU forefoot slider features new easy-screw fixing concept for quicker and easier replacement, Removable anatomic foot-bed includes EVA foam and Lycra? for comfort and support, Internal toe box protection is layered under the upper for durability, improved feel and performance