The Compressport Pro Racing v4.0 Run High socks have been specially designed to provide optimal ventilation and blister protection as you reach your goals. The technical fabric is lightweight and breathable, quickly wicking away perspiration to keep feet cool and dry, even at high temperatures. Their new wider toe box offers a more ergonomic fit and improved proprioception, allowing the toes to grip intuitively when stepping for a fluid and natural stride. Lightweight fabric around the ankle offers special support in the area as the pace increases, while the plush fabric protects the big toe from blackened toenails on long runs. The medium bridge support stimulates microcirculation and prevents the tissue from twisting and bending so that blisters and irritation do not occur.Two lines of 3D.Dots add protection and support in the Achilles tendon area. They surround a line of the new Flat.Dots that provide more ventilation. Underfoot, a cushioning design with 3D.Dots (75%) and Flat.