Backpacks that are specifically designed for ski touring are made of a canvas intended to resist to the abrasion due to the friction of the ski edges. They are equipped with a snow repellent back panel as well as a side and/or diagonal ski holder. Some models have a specific compartment to store the shovel and the probe which complete the essential AVD (Avalanche Victim Detector). The most efficient are even equipped with an airbag system that keeps the skier’s body on the surface of an avalanche.