Thermo Regulating Mattress Topper Some people may not be able to control their body temperature when sleeping. This may be due to a number of reasons that may include but are not limited to: reaction to medication they are taking, menopause, physical disability that prevents them from removing the bed blankets or it could even be a personal condition such as a form of Hyperhidrosis, etc. The Pelican range of Thermo Regulating (TR) Material items may help some of these people. The TR Material was first developed to help astronauts in space maintain their body temperature. The material should help to ‘keep cool people warm’ and ‘keep warm people cool’. The material allows heat from the body to escape and if the body is getting cold, it traps the warmth of the body. Different versions of the TR Material are now used for extreme snow sports clothing, some other specialised clothing and even in shoes to help people who have hot feet. As the reason why people perspire can vary a lot, we cannot guarantee the TR Material will work for everyone. As it will be used for sleeping, due to Infection Control requirements, we regret that we are not able to accept the items back for credit if they do not work.