This is such a lovely thing for days when you don't want to put the heating on or if you're feeling a bit under the weather and want some comfort. Its quite big at 150cm x 90cm, fully machine washable (You just unclip the heating controls) and can be tumble dried too.
The controller has 6 different heat settings and a timer and it costs from 1p per 3 hours to run so it's a lot cheaper than a hot water bottle. The cord is 210cm long so you should have plenty of space to plug it in as well.
It's a fleecy type of material and doesn't feel too heavy. It is available in either brown or grey plus with getting it from John Lewis you get an extended warranty of 2 years in total.
Free click and collect from John Lewis or Waitrose or spend £50 for free home delivery.