Duane, I have collected my gear over a period of time so my kit, which is listed here in the Winter Forum somewhere wasn't put together at one time as an integrated system. I added items that I thought would fit. I think a lot of people do it that way. I now have a pretty good set of layering for temps down to below 0F, but not for really cold weather. That stuff you can see on wintertrekking.

Don't forget, Mallory and Irvine used 1920's vintage layering and a re-creation of their gear seemed to work quite well on Everest, so don't be fooled that only the latest offering of high tech gear is suitable for winter.

My next purchase would be a really warm bag.