Reflection?

Thousands of tiny prisms reflect light back to its source; they produce exceptionally bright reflections at both long and short distances. Because of this, RFXT products appear extremely bright to motorists at the critical viewing distances of 100 to 600 metres.

Note that a minimum 15cm2 reflective area is needed to meet the requirements of the EN13356 standard for personal reflective accessories for hanger and stickers. For waistcoats a minimum is also required. There are different minimum area requirements all depending on which garment Class your customer request.