Alpinestars Supertech R Vented BootsMain upper material constructed using microfiber for optimum abrasion resistance, while also delivering high levels of flexibility Front flex area for improved impact abrasion while also ensuring the natural front and back Front flex area increases ventilation and airflow for additional breathability Redesigned rear bellow in stretch microfiber for improved natural front and back movement Redesigned top gaiter in microfiber material with Thermoplastic