Another user of Litesmith Reflx tarp guyline with UHMWPE fiber core, and has a hivis Polyester cover with reflective tracers so knots won't slip; 1.5mm for the ends and 1.1 mm for the side guyouts. I also use their reflective shock cord for in-line tensioners on the side guyouts, and for door management. It all lights up like a Christmas tree with a flashlight and to a lesser extent moonlight to help me not trip over it if I get up to pee.