Thermoplastic Elastomers sole Advanced microfiber main upper construction. Extensive perforations throughout provide maximum airflow. Soft TPR heel insert allows freedom of ankle movement. Ergonomic TPU shift pad. Angled closure strap follows natural shape of riders instep. 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.