Abstract: A thermally insulating single or multipart multilayer covering jacket for covering a person, includes a body side and an outer side. The covering jacket contains a transfer layer, a blocking layer, and a storage layer arranged between the transfer layer and the blocking layer. The transfer layer is arranged so as to face the body side and is water-permeable in the direction of the storage layer and water-impermeable in the direction away from the storage layer. The blocking layer is arranged so as to face the outer side and is water-impermeable in the direction away from the storage layer, and the blocking layer forms an intermediate space for storing condensed water which is formed from the steam transferred into the storage layer through the transfer layer.

Abstract: For easy determination of the current stress condition of a person, a device is proposed that detects the pulse rate and therefrom additionally determines the heart rate variability—preferably by means of a fast Fourier transform. In addition, at least one parameter related to the history of one of the two values mentioned above shall be used. Preferably, the deviations of the cardiac frequency and of the heart rate variability from corresponding norm parameters are integrated and thus used as an additional stress indicator.