Abstract: A bag or a rucksack has a base part having an enlargeable packing volume and first and second connection elements, between which a flexible wall element is arranged. A first packing volume is formed when the first and second connection elements are connected and the wall element is arranged in the first packing volume at least in part, and an expanded packing volume is formed when the first and second connection elements are separated. An additional part is provided which has an additional packing volume, and a first additional connection element is provided on the wall element and a second additional connection element is provided on the additional part. The additional part can be fastened to the base part by means of the additional connection elements.

Abstract: An avalanche airbag system with an inflatable airbag and a filling unit for filling the airbag with a fluid has at least one pressure vessel containing a fluid, and a trigger mechanism for opening the at least one pressure vessel as required.

Abstract: A breathing aid for enabling a person buried by an avalanche to breathe has a housing which includes an inhalation channel having a valve situated in the housing, which automatically opens during inhalation and automatically closes during exhalation, and an exhalation channel having a valve situated in the housing, which automatically closes during inhalation and automatically opens during exhalation, wherein the inhalation channel and the exhalation channel open into a mouthpiece situated on the housing, and the housing includes at least one inhalation opening into which the inhalation channel opens, wherein the housing is designed as a handle which can be gripped by a user's hand and brought to the mouth.

Abstract: A bag or a rucksack has a base part having an enlargeable packing volume and first and second connection elements, between which a flexible wall element is arranged. A first packing volume is formed when the first and second connection elements are connected and the wall element is arranged in the first packing volume at least in part, and an expanded packing volume is formed when the first and second connection elements are separated. An additional part is provided which has an additional packing volume, and a first additional connection element is provided on the wall element and a second additional connection element is provided on the additional part. The additional part can be fastened to the base part by means of the additional connection elements.