Nano Cord
Nano Cord is available in a variety of colours and is ideal for carrying around with you where ever you go, whether its out in the car, backpacking or a survival weekend.
With a breaking strain of 36LBs or aproximately 15KG Nano cord is still pretty stong given the thickness of 0.75MM.

Kelly Green - Elastic Cord 3 mm
Light Brown (BR521) BioThane 'BETA' 16 mm
Graphite Nano Cord