Meet the all-new Balega UltraGlide running sock, re-engineered for racecar-like performance and luxurious comfort. Whether running a 5k or a marathon, Balega's premier sock is constructed with Drynamix(TM) moisture-wicking technology and Lycra(TM) Dry friction reducing yarns, to keep feet cool and dry and to get you to the finish line without blisters or hotspots. Design: Targeted Cushioning: Metatarsal pad and strategic, medium cushioning in high-impact areas, like the toe and heel, reduce foot fatigue and pain Front and Rear Tabs: Provides extra protection against irritation and blistering and helps secure the sock within your shoe Anatomical Fit: Left and Right foot design provides a premium, custom-like fit that contours perfectly to your feet for a high-performance design Enhanced Breathability: Ventilation panels allow heat to escape, keeping feet cool and preventing overheating Precise, Locked-in Fit: Deep heel pocket and targeted mid-foot compression ensure a no-slip, secure fit that keeps the sock comfortably in place on your foot throughout your run Technology Blister Prevention: Lycra (TM) Dry Friction reducing yarn and seamless construction reduce friction and minimizes excess material inside the sock, preventing blisters and irritation Built-in, Moisture Management: Drynamix(TM) yarn wicks away moisture, keeping feet dry and comfortable. Woven into the sock, this feature lasts the life of the sock and will never wash out Additional Details