The IP3 Solestar insoles by Ergon are designed specifically for cyclists. These innovative insoles provide the highest level of support to the rider, focusing on the most important link for power transfer. The unique design features a stable, yet flexible core that extends from the heel to the forefoot.The key to the effectiveness of the Solestar cycling insoles is the patented Stabilization-Delta. This feature acts like a clamp in your cycling shoes, bringing your foot into the optimal neutral position and providing the support it needs during the pressure phase inside the shoe. This not only enhances stability, but also allows for better grip and more direct power transfer to the pedals.The IP3 Solestar insoles have been specifically developed to withstand high pressure loads, making them perfect for any cyclist. They can be comfortably worn in any cycling shoe without requiring any additional customization - just choose the right shoe size.As with all Ergon products, the IP3 Solestar insoles are developed and manufactured in Germany. For detailed sizing information, please visit the Solestar website at www.solestar.de/en/size-chart.