"Reflective material" refers to a substance or surface that can bounce back or reflect light, making it easier to see or be seen in the dark or low-light conditions. Full definition
If your children walk to school, ensure they are wearing some sort of reflective material on their clothes or on their book bag. (clothorganicdiapers.com)
This double stroller comes equipped with a quick - adjust padded harness with reflective material on strap. (mommystroller.com)
A special feature of this harness is that it is made with reflective material and hence, boost the visibility during the night walks. (usbones.com)