This has now become an essential piece of kit for me. It warmth to weight ratio is crazy and it packs down very small. No reason to leave home without it, whether running, alpine climbing or walking the dog. It has replaced my Arcteryx Proton LT as my go to insulator. Clean lines, warmth and ventilation. Excited to try it while split-boarding this winter.
Winter run essential, light yet warm. Keeps the cold off while not over heating. Absolutely see being used under hard shell for ski touring this winter also. Great moving lightweight insulator.