A Retroreflective Tape (Fabric) returns the light flux back to its source and makes a person visible for the drivers in the headlight light.
Tape (fabric) comes in several types: gray (silver), yellow, lemon yellow, orange, red and light green, 1-60 cm wide.
There is also a cloth (woven) tape with colored edges and a gray retroreflective stripe of high brightness (over 360 cd/lx·m2), 5, 10, 15, 20 and 25 mm wide
Retroreflective Fabric (Tape) Technical Requirements
Retroreflective Materials on Working Cloths Application Guidelines