It's warm because it's lined with fleece. I wore it once and then put it away. Originally, it came with socks, but I lost them, so it's just the dress. The size is M/L, and it was a relaxed fit for me, who usually wears a size M (height 158cm). I have dogs and cats, and the material tends to attract animal hair, so I will try my best to remove it before sending it, but please refrain from purchasing if you are looking for perfection.