AM sunglasses AM is hand made in high quality acetate for a premium feel with robust five-bar hinges & metal logotype. The lenses are made in NXT a lens material that provides superior optical performance & protection. Treated with anti-scratch anti-reflective oleophobic & hydrophobic coatings. Hydrogen grey Uranium Black Hydrogen white & Astatine Blue frame: Grey lens VLT 15% &40; Cat 3&41;. Neutral tint that is relaxing for your eyes during long term use. Lanthanum brown &40; Turtle brown&41; frame: Brown lens VLT 15% &40; Cat 3&41;. A contrast enhancing tint for better definition.