This Pro model is the result of 10 years of development of bicycle mirrors. It has adjustibility, flexibility, range, clairity and stability. It attaches to any helmet with an adhesive pad. If you need extra pads contact: The Third Eye. The Pro Helmet Mirror glues to the inner or outer surface of almost any helmet. It has a longer arm and a larger mirror and has extreme range of adjustments. The mirror and arm are detachable from the helmet. The shatter proof aluminized glass mirror will not discolor.