The Foam Helmet mirror was invented because of the development of the Foam Helmet; helmets that don't have a hard outer shell or that have a microshell (very thin shell).
The mirror and the arm are out of the same mold as the Eye Glass mirror (1 1/8 inch shatterproof glass mirror with an aluminized reflective backing). The mirror attaches to the rim of any type helmet. The Duel-Lock (like Velcro but much better) is attached to the rim of the helmet and the Duel-Lock on the mirror snaps on to it. The new attachment is a great improvement compared to Velcro (no vibration!).