Quality characteristics. Filament fiber for extreme durability | Wide top band for a perfect fit | Extra-flat toe seam prevents pressure points | Anatomical design Functional characteristics Metatarsus compression zone for arch 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.