Size M I've used this for about three seasons as everyday cold-weather wear. I've used it for hiking about 2 or 3 times. * There is a tear about 1 cm long near the left shoulder. I think it can be used without any problems if repaired with a patch or something. It's very lightweight and easy to move in, and it also has ventilation under the arms to release excess moisture, making it an excellent piece of active wear. How about it for commuting to work or school in the coming cold season? ◇ All-season active insulation wear that pursues moderate heat retention and lightness. It incorporates the uniquely developed "Fine Polygon" as an insulation material. It maintains loft and ensures heat retention even when wet with sweat, water, snow, or condensation. Furthermore, by adopting a lining with sweat-wicking properties due to hydrophilic coating and a fabric with moderate breathability, the entire garment manages sweat, maintaining comfort during active wear. "Packable" specification that can be stored in a pocket. Achieves a lightweight design under 200g. It can be worn as an L3 mid-layer during the cold season, and can be carried compactly as a portable insulation garment during the warm season, making it a convenient piece that can be used all year round.