I seem to suffer from a bit of a dust allergy and was thinking it would make sense to get a decent blanket for my bed to replace the synthetic, unwashable duvet I have at present. I'd like to replace it with something with anti dust mite properties etc, but still want to have the warmth in Winter so was thinking something along the lines of organic cotton/bamboo. that will be light enough to throw in the wash and dry at room termperature over a day or two but heavy enough that it will keep me warm in Winter (up to -10 Celsius can be the outside temperature). Even if I was to have two blankets on the bed it would be fine.

Just looking for any recommendations :) Lint free etc if possible too!