A decent length of quality cord can go a long way on any adventure, whether it's in the 4WD, at a campsite or in your rucksack. It can be used for repairs, clotheslines, replacement guy ropes and for tying up lanterns.
The Para Cord from Huss comes pre-packaged in 15m lengths, complete on its own spool and has been tested to approximately 250KG of breaking strain.
It's 100% nylon and features a 7 strand core protected by a woven sheath, which means it's going to see you through many adventures.