I have already worked this one out. Given that there are certain areas of the world in which any British or American citizen stands to be kidnapped, coerced and then murdered, you need a concealable escape kit. In practice that means something like the SAS escape belt. That's basically a webbing belt that has various item sewn to the reverse side under a layer of material.

What I have done is take an Eagle Creek money belt and stash in it:
1. A spark-lite.
2. Tinder.
3. Tin Foil.
4. Wire.
5. BCB Commando Saw.
6. NATO brass compass.
7. Scalpel blade.
8. 4' paracord.
9. 10' braided cord.
10. 4 small cable tidy's.
11. A small fishing kit, including a gaff hook.
12. 20' Dental floss on a spool.
13. 4 MP-1 tablets.
14. 2 needles.

That gives me everything that I need to kill one or more of my guards, set a booby trap or four, escape and make my way to freedom.

As a point: a lot of the bits came out of one of Doug's SK and it's quite heavily modelled on the survival kit belt reviewed in the survival kit's section on the main site.