This has been a neck-saver for us. We frequently cruise along the sidewalks of East Cobb county, along with many other cyclists. This rear-view mirror has excellent visibility, and it allows us to see bicyclists approaching from the rear, long before they've closed the distance between us.
The Third Eye mirror clips to the temple piece of most eyeglasses and dark glasses. It's 1 1/8 inches in diameter, made of real glass and is shatter-proof.
Glasses not included.