I have a lot of backpacking gear and consider a portion of it as crossover gear suitable for a BOB and other emergency kits.

That said, a lot of my stuff is ultralight with a focus on multiple uses and low carry weight in the context of the areas I go backpacking. While it would be useful to some extent for a survival situation, or if I needed to travel fast and light to get out of Dodge, I'd choose other gear for the BOB.

I have a survival/BOB kit that is modular and based on an Eagle Creek Bhatah Sab pack. I swap components in and out of it depending on whether it's sitting at the house for a quick exit, in the trunk of a car, or in a plane when I'm piloting - there are different mixes of items for each.

The backpacking crossover items I include are:

- My mini-FAK (there's a full FAK in the larger kit as well)
- My PSK
- A stove of some sort (not always included); an Esbit when flying (most stable fuel); an Optimus Nova for the car or home kit (runs on lots of fuels, including the diesel and unleaded our two cars run on)
- Titanium cook kit and lexan spoons
- Hydration bladders
- A silnylon tarp
- Lightweight line and titanium stakes
- Silnylon ponchos
- Avalanche shovel and ice axe (go in the car kit for winter, even when I'm not bringing them along for snow camping)

Most other items don't have the durability I'd like for a survival kit, or are just meant for a different purpose. Tents take up too much room for a compact survival kit, and of course can be tossed in separately in the car or plane if I do decide I want them. Food and the like for a survival kit is different than what I take backpacking. Clothing for backpacking or snow camping is not necessarily what I'd put in a BOB. The knife I take backpacking (a Victorinox Classic) is completely unacceptable for the survival kit.

It's a good question, though, and I'll think about it more. Maybe one of these days I'll post pictures and a description of my full modular kit (I did a post with some basic pictures long, long ago on this forum).