SKI BOOT Dynafit toe compatible PIN installSKI boot PIN INSTALL allows you to keep rocking the alpine boots you know and love, while adding tech compatibility for super efficient touring. If you have replaceable soles we will modify those soles and your boots for tech compatibility. If you have a hard soled boot, we can throw on custom rubber tread lifters for better grip and protection. This means you wont have to replace your boots just cause the soles start wearing thin. ISO 5355 norm, for