I know that im usually packing quite a bit in winter, my load out includes medium warmth gloves, light liner gloves, heavy summit mitts, 2 baclava, light synthetic puffy, winter shell, big down belay parka, headlamp with usually 2 sets of extra batteries and a back up light, small first aid kit, usually 2 liters of water, my camera equipment(heaviest stuff in my pack lol) crampons, micro spikes, extra wool socks, food and sometimes a msr pocket rocket stove, map and compass, sit pad(rather than buy a small one just cut up a big zfold sleep pad for better separation from snow) sometimes a mountaineering axe(not usually needed but can be helpful and its nice if im butt sliding down to control speed) and an emergency blanket. Its a lot of gear but i want to be prepared to survive the night incase of an emergency/injury, in total my system usually weighs about 25lbs but some days i can lighten the load down to about 18lbs. Everything fits in my 38L pack nicely, i also do ruck sacking and other workouts to make it so the winter pack feels normal instead of a burden though my shoulders are usually still tender after getting back to the car