1.Metal Frame - The flexible arms are made of Super Elastic memory Plastics and Aluminum Magnesium Material in Germany which makes it possible for this night glasses to perfectly fit onto different faces thus, a "one size fits most" eyewear.
2. Polarized Yellow Lenses- This polarized lenses absorb over 80% harmful UVA and UVB spectrums, reduce glare from oncoming headlights, and enhance contrast to avoid visibility loss.