Standard guyline disappears at dusk. Tracer cord catches headlamp light and saves your shins. 50 ft of 1.8 mm nylon cord, tightly woven for low stretch, rated to 250 lb, bright red with reflective strands. Wrap it on a Carbon Fiber Spool to keep guylines tidy. Use it as the pull line for the Tent Tool. It's the same 1.8 mm cord that ships on the Hang System. Rigging That Works covers the cord, staking technique, and a repeatable camp setup. It works for tent and tarp guylines, a camp clothesline, or any line you need to see after dark, and the full 50 ft weighs 30 g.