Understandably a bestseller, the Peuterey INTEGRALE 45+10 is designed for multi-day mountaineering trips, both summer and winter. Its mountain shape has more flex at the base, with slightly ampler volume. The U-shaped zip access to the main compartment goes right round the front, for easier kit retrieval. Distinctively, only this model in the range offers an ample crampon pocket on its face - a serious asset. Other important features: ultra-rugged ski holders, and FPP ice axe holder.