Cotton hosiery socks feature dimensional minky character with LED lights. CHRISTMAS LIGHT-UP SOCKS BY MUD PIE Light up your feet and your holiday spirit with these festive Christmas socks from MUD PIE! These cotton hosiery socks come equipped with an adorable minky character and fun LED lights, making them the perfect accessory for any holiday celebration. Don't just wear any old socks this Christmas, let your feet shine and spread some cheer with CHRISTMAS LIGHT-UP SOCKS BY MUD PIE!