Features: Reversed Crosta upper 360 degree ankle cuff for superb comfort and dexterity. Pro Flex midsole, gives exceptional underfoot support. Taibrelle/velvatine lining for comfort and moisture management. Vibram M4 Tech sole, gives amazing underfoot grip and security. Crampon rating – B2. Crampon Recommendation – Grivel Air Tech with New Matic binding. Guideline Tempreature zone - +25 to – 7.5 C. Weight 1930G size 42.