They are structurally similar to trekking, but are smaller (30-50 liters) capacity, and often have no internal skeleton. Straps and belt may be more hard and with no ventilation – all the same backpack worn on a sponge. Importantly, this backpack should weigh little and at the same time be strong enough so that you can pick up on the rope. Also require external fasteners rock and ice gear. Backpacks for other types of activity are similar in size to the assault backpacks. But have their own peculiarities. Ski, skiturovskie borderskie and backpacks in accordance with the purpose have different types of attachments for ski and snowboard gear and avalanche on the outside of the backpack.
Often have a skeleton in the form of a solid plate, which protects the spine from injury in case of unsuccessful fall. There are two types of veloryukzakov. The first are similar to regular backpacks small volume (10-40L). They must have a suspension system that provides good back ventilation. They have a lot of pockets for basic necessities.
Keys documents, etc. Many models have a compartment for hydration system and a special elastic attachment or pocket veloshlema. These backpacks are suitable for day pokatushek. Another type of veloryukzakov so-called "pants" fixed on the trunk of the bike. They allow you to carry a lot of cargo required in a multi-day hike. They usually have three sections: one attached to the left of the wheel, the other – on the right, the third – at the top. All backpacks necessarily the presence of patches of fabric with a reflective coating. Regular camping "pants" must be equipped with straps that allow for difficult areas to carry a backpack as usual, on the back.