Thanks to its adjustable height, the Zip-on pack for pros has a packed volume of up to 50 liters for long trips or tours lasting several days. The ski mounts on the side make carrying skis in an A-frame manner more comfortable and this model also has a snowboard or snowshoe mount. The top compartment is particularly spacious and there are also compartments for water bottles, skins, maps and snacks and a separate pocket for valuables. The special compartment at the front providesquick and easy access to emergency equipment. The bottom of this model can be compressed when less room is needed. Further features include a helmet net and an ice axe mount.