Traditional Japanese Winter Wear (Pre-WWII Era)?

I'm writing up a little bit of fiction for NaNoWriMo and intend to make it as legit as possible. Now, I know that kimonos and the like made out of silk, hemp, or even cotton can get pretty chilly in the winter months, so I was wondering what type of clothing was worn during the cold winter months in Japan while traditional clothing was still in fashion.