BMW Genuine Motorcycle Riding Airflow Boot Cover EU-44/45|USA-M9.5/M10 Black BMW Genuine Motorcycle Riding Airflow Boot Cover EU-44/45|USA-M9.5/M10 Black This waterproof / dirt-repellent overshoe cover is specially designed for AirFlow boot. It is made of stretch / PU-coated material with sealed stitching.