I bought it new two years ago. It is slim fitting, I bought a 38, a size up from my own, so it would be big enough to wear a jumper or even a suit underneath it - I use to for work - but even then it's not huge. It's amazingly warm when it's fully buttoned up: the fabric is amazingly water and wind resistant (rain just brushes off), the collar stands up high-enough to become almost like a scarf, and the back vent buttons over, so it keeps out the draft. I can only imagine a shearling-lined coat would be warmer. The first time I wore it was on one of the coldest days of the past two years. I spent the whole day out in a howling blizzard and it was the only thing that stopped me from freezing to death!