Finally found a good ski touring upper body layering system!
Usually I’m too hot, or too cold.
My new system is an Icebreaker 200 t-shirt and a REI Packable Fleet Jacket. The Icebreaker provides some warmth and the Fleet is nice and light but yet blocks any wind.
I had considered other running jackets like the North Face Hydrogen, North Face Better Than Naked, Patagonia Nine Trails and Arc Teryx Accelero but hard to beat $50 at REI.
Update: I have my eye on the First Ascent Sirocco jacket. Might upgrade for the hood :).