Survival clothing in my usual SOCAL haunts would be a short list, primarily consisting of clothing for a short period following a serious earthquake.

However, I'm not always in SOCAL and for the times I leave there is a large duffel bag with clothing I don't typically wear in SOCAL:
- Nylon canvas pants which will soon be replaced/supplemented by REI Shuksan Pants. Depending on how they fit, I may provide for another layer.
- Parka w/liner
- Wool long underwear
- Wool shirt
- Wool sweater
- 2 pair Wool socks & 4 pair sock liners
- 8" Boots
- SmartWool Cuffed Beanie
- Gloves & glove liners

For some of you that may seem like overkill, but when you're acclimated to the lower elevations of SOCAL, anything south of 30°F is really cold. If it's too much I'll skip a layer.