Orientation problems due to poor visibility, the failure of an important piece of equipment during a variant descent in a remote area or an injury: sometimes situations arise in which you can no longer make it back to the valley in time or under your own steam. If there are no flying conditions, you will have to spend the time until the terrestrial rescue services arrive – or possibly the whole night – in the terrain. A bivouac sack protects you from cooling down for a short time and keeps out the wind, while a snow cave offers more protection from the elements. The so-called “Panzerknacker Igloo” has proven its worth.