The BT Racer Sock is a mid length sock for your coldest runs, made with our heat generating Breath Thermo® technology, this lightweight sock boasts all the warmth you need without the bulk. 

• BREATH THERMO®: Mizuno's exclusive thermal fabric technology that uses escaping body vapor to generate heat.
• DRYLITE®: Using a dual filament yarn construction to transport excess moisture away from the body to create a comfortable and dry body microclimate for best performance.
• Padded heel and forefoot
• Right- and left-specific fit for greater comfort and stability
• Lightweight fabric: Allows athletes to feel cool during play.