Overall score includes:

Heat-up (40%): Shows how quickly the blankets reached their peak temperature on their highest heat setting.
Controls (20%): Assessed on the user-friendliness of the controls.
Fitting (20%): Assessed on both the initial fitting and whether the blanket stayed in place.
Cleaning (20%): Assessed on how easy the blanket was to clean and dry.

Running costs are calculated from the energy consumption of the blanket during warmup, then running it for 8 hours per night over the 3 months of winter on its “All-night” setting. If there is no “All-night” setting then only the warmup consumption is taken into account.

Price is from a June 2018 survey.