Synthetic material</br>Made in the USA</br>Synthetic material sole</br>The thinnest super feet insole</br>Versatile shape that offers high performance support</br></br>Product Description</br></br>Superfeet carbon insoles fit a wide range of tight-fitting?? low-volume athletic footwear?? even ones with non-removable factory insoles. Superfeet carbon's breakthrough design combines the strength of carbon fiber with ultralight foam to create the most innovative?? high performance Superfeet insole ever. The result of years of research and field testing?? Superfeet carbon is ideal for the dedicated athlete who demands high performance results.</br><br/>http://www.amazon.com/gp/product/B00EZ6YXGW