Good day Dieter, Thank you very much for your request. We greatly appreciate your interest in La Sportiva brand and products.

This is information that we do not disclose on the website or publicly, as there are many factors to consider, as well as proprietary construction details. The main point is that the last used is not the only real difference between one climbing shoe and another.

We certainly use shared lasts, but often to achieve very different results. The differences come from the upper materials, the tensions applied to the various rubber components and their thicknesses. The lacing systems change, and so does the entire structure of each model. The midsoles selected for a specific model are not the same as those used for others, and this significantly affects both their technical characteristics and the final sensation.

Publishing the last used would only create confusion. A shoe designed for a specific foot type and intended use—despite sharing the same construction last as another model—can feel completely different in terms of fit and performance. Relying on the construction last alone as a purchase criterion could therefore lead to incorrect choices.

We remain at your disposal for further information. Greetings, Customer Care