Size: about Size40//25 cm Size41/approx 25.5 cm Size42/approx 26.5 cm Size43/approx. 27.5 cm Size44/approx. 28 cm Size45/approx. 28.5 cm · High speed airflow material, wont against weather situation without worrying to wear everywhere. Two layers of TPU materials, shock resistant performance and even if you when you fall to reduce friction. Ankle inner foam to the equipment, and boots that wrap around the foot for a just right fit for a stable and comfortable in all conditions. · Equipped with a durable protection to the ankle area, and the sides. It could protect your feet from impact. Side zipper and velcro closure and unique design and will be more easy to wear.