Uh, charms? Layla hadn’t been using those to stay warm, mostly because the effort needed to cast them way out weighed the time they lasted. And in this weather, she didn't think it was wise to expend that kind of energy for that when she needed it to just get out of bed in the mornings. But she wasn't going to point that out.

She had planned to keep quiet on this question, but then people were mentioning muggle ways of keeping warm and one had even mentioned muggle ways being more fun, so......."I've been using this electric Snuggie that my mom had charmed to work amongst magic and sent before the owls escaped," thank you, Ms. Buffay "and adding extra layers when needed." Like this jacket. "Plus, I've been eating a lot of soups, stews and chillis and drinking lots of hot tea." Basically, the same things everyone else was doing, aside from the Snuggie.