I would think that it would have to actually be Winter and in a cold climate! Where I am doen'st get cold enough or have a long enough of a cold season for them, personally I don't like any of the fur bags, just makes me think of the animals that were slaughtered just for the fur.
Now don't rag on me, JMHO and yes, before you ask, I do wear leather, but I don't eat the cows, I figure that everyone else is eating them, the skin is a by product, the hooves are used as dog treats or glue and all the rest of the parts are ground up and made into herferd logs, which by the way big cats in capitivity eat. No waste and the cows don't live in terrible conditions until they are slaughtered.
P.S. th only thing my Grandma left me when she died was a damb 30K mink coat that I will never wear and always told her I didn't want. (I was the only girl close to her size)