Quality Characteristics: Filament fiber for extreme durability. Wide top band for a perfect fit. Extra-flat toe seam prevents pressure points. Anatomic design.Functional Characteristics: Metatarsus compression zone for arc stabilization. Open-pore mesh structure in the calf. Optimized Achilles tendon protector. The hydrophile finish effectively wicks moisture away from the skin for perfect heat and moisture management. Air channels for ventilation in the foot region. More Energy, Greater Endurance and Enhanced Performance Thanks to Improved Blood Circulation.Activates the Flow of Blood in the Muscles.Muscle and Joint Stabilization for Reduced Risk if Injury.Increased Coordination by Activating the Muscles for a Sense of Stability and Security when Running.