If you're going to spend a lot of time outdoors this winter you need a coat that's really warm - not just for show.
Your average high street coat won't cope with winter walks or standing on touchlines.
Fill weight is the amount of down in your coat. It's just as important as down quality. The more down the better for warmth. It's the same with synthetic insulation - the more the better to keep you toasty.
If it rains a lot where you live you need a fully waterproof coat with waterproof sealed seams. Don't buy a water-resistant coat by mistake - it's not the same and you'll be wet through by the time you get home!