Soft TPR heel insert allows freedom of ankle movement. Ergonomic TPU shift pad. Ergonomic boot shaping for forefoot streamlining. Angled closure strap follows natural shape of riders instep. Front Velcro closure system, with reverse zip. Sole Material: Rubber Heel Type: Flat A class-leading, low-cut performance riding boot, the SM-1 R v2 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 and reinforced with strategically positioned TPU protectors, the SMX-1 R v2 Riding Shoe 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.