I keep what I call my 'Scottish Nightie' in a drawer for when I visit my hardy sister up in the wilds of Scotland. It's a thick winceyette, flannelette type of thing, size XXL, (far too big for me, but every centimetre counts up there!) and comes right down over my feet. It's warm and cosy, and it helps me to survive. My sister's house is like a well-appointed fridge, I don't know how she stands it. She always did have hairy legs, now I know why!