The Apollo lenses contain special crystals that darken when exposed to sunlight.
At night they are transparent, but as light intensity increases, the lenses turn darker to protect your eyes and improve your visibility.
The sunnier it is, the faster it darkens.
The Celerus lens is made of Polycarbonate. This material is so resistant that is used in bulletproof glass, riot shields, and even astronaut helmets.
If you wear prescriptions glasses you can fit Rx lenses in the Celerus. All you have to do is clip in this simple adaptor:
Key Features:
If you want to clean the lenses, use water .Do not use alcohol or any other chemicals. Do not store the sunglasses in an environment of high temperature or humidity.