> The rear part under the heel is made with two different co-injected materials.

> The upper element, in high-density thermoplastic polyurethane, provides stability and support and is used for secure crampon attachment.

> The lower element in low-density polyurethane combined with the dual-density microporous midsole, assures optimum shock absorption.

1. High density TPU element
2. Low density TPU element
3. Double density rubber microporous midsole
4. Asolo/Vibram Ascent rubber outsole