The go to all day jacket
Picked up on a whim in the Fort William Ellis Brigham store after recommendation from staff there, this has become my go to mid layer.
The comfort comes from the lightweight, minimal seams and near windproof material, coupled with just enough insulation to hold core temp during sedentary use and yet dump heat during arms up, vigorous activity, given the underarm stretchy, breathable panels.
Used for everything from winter ice climbing, summer evening jacket and saturated Scottish days,
Warm when wet, minimal size. Near perfect (a fraction of a star lost due to it having very tight cuffs which don't play nice with my fat forearms!).
Atom LT Hoody
Does exactly what Arc'teryx say it does. Great mid layer or light weight belay jacket. If you want something a bit more heavyweight just go for the AR or SV.
I bought this jacket as a bit of a gamble over a North Face down jacket and am really glad I did - it's great!