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
This small diameter cord is the same as we used to keep in the parachute loft in a parallel universe on another planet long ago and far away. Basic issue was 20m to aircrew personnel for tethering essential life-safety gear to your SV2 survival vest and PK2 para-raft kit (dating myself). I combine with the small flatgate snap links to improvise pistol lanyards, attach utility pocket knife, signal mirror, whistle and blinker signal to man-overboard /bailout bags, etc. Any piece of gear you cannot afford to lose when in "Indian Country" needs to be clipped to some of this which is securely tied into your survival vest, ruck flight suit, etc.