Tani handmade cellulose acetate frames (acetate is made from cotton & wood, is eco friendly, sustainably sourced & biodegradable). S tainless steel cores for strength and flexibility. Extra sturdy and durable zinc-free barrel hinges. Optical-quality nylon lenses with 100% UV protection. Custom Brain Dead case and cloth included. Post Modern Primitive Eye Protection ™ Color: Root Beer Float Sizing (lens width - bridge width - temple length) Tani = 43-27-150 mm 14 day FREE return window within the US!