The Compressport Pro Racing v4.0 Ultralight Run Low socks are made with ultralight mesh fabric that is designed to fit like a second skin with exceptional breathability that wicks away sweat quickly and keeps feet cool and dry, even in wet conditions. Their 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. A special knit around the ankle, lighter than standard running socks, provides good support as the pace increases. Compressport's signature bridge support prevents the fabric from twisting and irritating the skin in the heat. In addition, the plush reinforcement around the big toe prevents the nails from blackening as you walk along the trail. The special 3D.Dots and Falt.Dots technologies of this ultra-lightweight model save volume and weight but offer the same high performance advantages.