Superfeet Carbon Size:F Sock lock reinforcements help to

Sock lock reinforcements help to keep your heel from slipping

and Paulownia wood to provide the perfect balance of strong and light

the windchill just got a little warmer

Twin Fly®

Superfeet Carbon Size:F Sock lock reinforcements help toBreakthrough technology uses the strength of carbon fiber with ultralight foam to create one of the most innovative, high performance Superfeet insoles ever. Made to fit well in moderate to slim fitting athletic footwear, like running shoes, bike shoes and cleats. Trim to fit your shoe size. YOUR PURCHASE MAKES A DIFFERENCE Every year, Superfeet donates 1% of sales and 1,000+ volunteer hours to organizations working to shape a healthy future. HEEL CUP