Men are too warm, women too cold: finding the right duvet with Hohenstein in Germany

‘Many people know the problem,’ says Hohenstein Institutes in Bönnigheim, Germany. ‘While “he” sweats at night in the bedroom, “she” is much too cold. Women and men not only have different sensitivities to heat, they also produce different amounts of heat. A duvet must not only insulate or keep warm appropriately, but must also divert moisture in the form of vaporous sweat away from the body. Hohenstein has created Charlie, a thermal manikin, to determine how much heat a person must produce in order to obtain a consistent skin temperature under the duvet. The attribute of sweat absorption and sweat diversion can be tested using this so-called skin model, in which a porous sintered metal plate represents the skin of the person.