When the military needs small cord to help secure their gear, they use this 3/32" Tether Cord. This U.S. made tether cord is also called "Sensitive Item Securing System". It's used throughout the military to secure things like strobe lights, compasses and knives to the operator.
Fisherman Knot Static Breaking strength of tether cord 244lbs. ( Tested by Rescue17 )
300 Foot Spools