Human bed warmers have been recently recruited by the Holiday Inn in Britain to warm the beds of guests so that they get a good night's sleep.
The walking electric blankets don special all-in-one sleeper suits when they slip into guests' beds to warm them.
"There's plenty of scientific evidence to show that sleep starts at the beginning of the night when body temperature starts to drop. The decline occurs partly because the blood vessels of the hands, face and feet open up and release heat," the Telegraph quoted Dr Chris Idzikowski, director of the Edinburgh Sleep Centre, as saying.
He added: "A warm bed - approximately 20 to 24 degrees Celsius - is a good way to start this process whereas a cold bed would inhibit sleep. Holiday Inn's new bed warmers service should help people achieve a good night's sleep especially as it's taking much longer for them to warm up when they come in from the snow."
According to Holiday Inn spokeswoman Jane Bednall, the idea was "like having a giant hot water bottle in your bed".
The first five-minute free bed warming sessions will be tested in London and Manchester at the end of January.