Newman handmade cellulose acetate frames (acetate is made from cotton & wood, is eco-friendly, sustainably sourced & bio-degradable). Stainless 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 ™ Sizing (lens width - bridge width - temple length): Newman 47-21-140 mm Color: Yellow 14 days FREE return window within the US!