I'm actually excited to share this because I've been mentioning my love for these things for a while. I have several of these.
They have gone up in price. The one I linked is very well made. Any similar one will work, so long as it...ahem....breaks wind.
This is just a pullover windbreaker (not just for football coaches, golfers, and guys on a sail boat...anymore).
Like you, I walk in cold so I don't sweat. So, I don't want my outer layer to be windproof (aka a sweat box) unless it is crazy cold/windy.
I pack this thing in first (last to come out) in my compression sack with my layers (so I can put my layers on in order as they come out of the compression sack) It goes on over my insulating mid layers but under my outer jacket. I walk in most of the time with just a base layer and then a thin to mid weight jacket (that breathes). It has to be below freezing for me to deviate from that.