- Para cord, rope, leather thong and bungee cords for on the go fix-a-jobs
- pare stirrup leather or belt - doubles up as almost anything
- Overgirth (this would not count in your 5kgs, its effectively tack not luggage, and a jolly good idea to boot)
- Gaffer tape
- Heavy duty needle and thread- in case of tears to saddle bag, or even you.
- Sleeping bag (able to cope with fluctuations in temperature)
- Bivi bag for nights under stars
- Basic medical kit; Pain relief: paracetamol, ibuprofen. Blister/rub treatment: blister dressings, zinc oxide tape, vaseline, antiseptic cream e.g. Savlon. Your guts: oral rehydration, loperamide, anti-acid. Ancillaries: chapstick, good sunscreen, plasters, small scissors, and water purification tabs
- Leatherman or similar multi-tool
- Tiny keyring torch attached to you- in case you can’t find your headtorch
- GPS and spare lithium batteries - you'll use 3-4 sets of AAs, depending on how twitchy a user you are. NB lithium batteries outlast ordinary AAs by a street, accept no substitute.
- Compass (in case you lose the above)
- Mongolian phrasebook
- Something warm - a down jacket is much more useful than a huge sleeping bag, it's cold for the last riding hour of the day
- Something waterproof
- Maybe a spare pair of pants. In a ziplock bag.
What you wear and how stinky you get is up to you.
Less essential items which you could bring are:
- Roll mat and inflatable pillow (if you're a bit soft)
- A few army rations (although it's easier just to man up and eat what the nomads eat)
- Wet wipes - great for getting clean(ish) while in your sleeping bag
- A cloth / sponge for cleaning sweat and grime off your girths. The less dirt and dried sweat there is on your girths, the less chance of girth galls
- Small gifts to give to the nomads (tiny torches, whisky miniatures, snuff sweets...)
- Cigarettes (seem to be useful even if you don't smoke)
Really this is a key part of the 'On Your Own' ethos. Have fun deciding what essential and what's dead weight