Are you going to some exotic country in the winter time? 

You dont know what to do with your winter coats?

I will give you risky but checked idea!

Few years ago I went to India during the winter time and I did not want to carry my big coat with me. The departue flight was from Paris so there was no option to leave useless stuff at my friends place. I came up with super idea to leave my jacket at lost property office. I told to the worker that someone left the jacket on the hall. The woman took it with a big smile. I was a bit worried if I ever will see it again but I was trying to not to think about it. When I came back to Paris after two weeks I easly recovered the jacket and proudly headed to Poland :D Isn't it a good advice??!