If you are a true gear nazi you will need: down bag, synthetic bag, winter and summer of each, light pack, day pack, technical pack, expidition pack, snow shoes, skis, poles, trekking poles, trail runners, light hikers, gortex light hikers, mountaineering boots, crampons, ice axe, tent, 4 season tent, bivy sack, tarp, first aid kit, compass, GPS, altimeter watch, MSR cooking set-up, rain gear, soft shell, hard shell, 3 types of hats and a balaclava, 14 pair of gloves, 8 pair of pants that zipper off at different levels, level one, two, three, four and five of capilene. Puffy down, heavy down, gogles, glacier glasses and wait...I'm not getting into the technical stuff yet