I made it in a flowery fabric with an old bathrobe as insulation on the inside, to make it winter safe. It was a pretty easy and fun project and I just used an old hoodie for pattern. That is one of the best way to sew your own clothes. Take apart and copy the clothes that already fit you and that you know you like.
There will be a YouTube video on the making of this hoodie in a couple of weeks. In the meantime you can check out all my other videos.