We sell Retroglo yarn “2P2” from Metlon by the yard. This yarn is a ribbon/tape format and comes in three widths. It is reflective on both sides. Approx. 975 yds per pound for the 1/23” width
Based on a technology by 3m that places thousands of glass beads per square inch.
Suggested to use along with your regular yarn as a reflective stripe in outerwear. Photos show with flashlight and without.