I've just bought one of these from J&S which is absolutely great.
I used to wear a shirt and sweatshirt under my winter jacket, but, even with the jacket's inner lining in place, because it had zips under the arms (for ventilation if it gets too warm) it would still let in a draught.
Now, instead of the sweatshirt I use the Anti-Freeze jacket and it keeps that cold air at bay even though the sleeves can be zipped off so you can use it as a gilet/ body warmer.
It's well worth the money :thumbup
I used to wear a shirt and sweatshirt under my winter jacket, but, even with the jacket's inner lining in place, because it had zips under the arms (for ventilation if it gets too warm) it would still let in a draught.
Now, instead of the sweatshirt I use the Anti-Freeze jacket and it keeps that cold air at bay even though the sleeves can be zipped off so you can use it as a gilet/ body warmer.
It's well worth the money :thumbup