Sugoi RS Winter Socks. Sugoi RS Winter SocksThe RS Winter Socks from Sugoi are a great choice for cycling in winter weather. Featuring Merino wool for durability in a breathable fabric with moisture transfer to keep your feet dry.> Winter Cycling Socks> Breathable fabric> Moisture transfer> Stretch design> Elasticated cuff> Sugoi branding> See label for composition> Machine washable