The Compressport Pro Racing v4.0 Run Low socks offer revolutionary ventilation and optimal blister protection for high-temperature runs. The technical fabric is lightweight and breathable. In addition, it quickly wicks away sweat to keep feet cool and dry. Its toe cap, with a new wider design, offers a more ergonomic fit and improved proprioception, allowing the toes to grip intuitively when stepping for a fluid and natural stride.The lightweight fabric surrounding the heel, like that of the PRS High version, offers special support when you pick up the pace, while the plush toe protector fabric prevents 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.New Flat.Dots technology adds special 3D.dots around the Achilles tendon to provide extra protection and reinforcement to the foot on the court. Underfoot, a cushioning design with 3D.Dots (75%) and Flat.