DESCRIZIONE
A lifejacket (1) for aquatic use having a back part (1a) and a plurality of front parts (1b) which can be connected to one another by means of a fastener, wherein the lifejacket (1) is formed from a plurality of layers, is intended to improve the survivability of its wearer in an emergency situation, particularly in relatively cold waterways. For this purpose, the invention proposes that the lifejacket (1) has a layer (16) which is located at or adjacent to its inside and is composed of a latent heat storage material, in which an exothermic reaction takes place when activated by an activation unit (20, 21) that is provided. The layer (16) which has the latent heat storage material is subdivided into a plurality of chambers (24) in the back part (1a) and in the front parts (1b), which chambers (24) are directly connected to one another or are connected to one another via connecting channels. Furthermore, the lifejacket (1) has short arms (22) which cover the shoulders and extend into the upper arm area. The layer (16) extends into the shoulder area and upper arm area.