Frame Material: Absinthe is a cool crystal with a cool hue handmade from zyl acetate. | Hardware: Five barrel hinges with a wire core embedded in each temple for strength. | Lens: Vibrant Brown Polarized CR-39 lenses manufactured by Carl Zeiss Vision. Featuring 100% UVA/UVB protection and 4 base curve. | What's In The Box: Includes a premium hard sunglass case and custom printed polishing cloth.