“Smart Lock plus Elastostop Indirect is the standard locking system for EVO BOOT 1.0 Premium and EVO BOOT 1.0 Basic”.
Both locking sytems work perfectly but you might prefer one of them. If you order the PREMIUM hoofboot you’ll receive both locking systems as a total package. But you can easily modify the locking system by ordering Elastostop Direct and exchanging the parts with a simple screw driver. No special crafts skills required !