noun
reflective material; safety reflector
Refers to material that reflects light, commonly used in safety vests, traffic signs, and bicycle reflectors.
夜間のジョギングには反射材の付いたウェアがおすすめです。
For jogging at night, clothing with reflective material is recommended.
自転車に反射材を取り付けると、夜間の視認性が向
Attaching a reflector to your bicycle improves visibility at night.