Mizuno Breath Thermo Racer Mid Running Sock Size:Small Internal Support Strap: Securely holds

Internal Support Strap: Securely holds mid-foot area

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of snow and rain

Light compression inner sprinter

Mizuno Breath Thermo Racer Mid Running Sock Size:Small Internal Support Strap: Securely holdsThe 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. TECHNICAL DETAILS 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