In introducing ourselves to you we are pleased to comment that we have been engaged in shipping eye&sun glasses frames of all descriptions to all over the world enjoying a good reputation for a good many years. We sell over 10,000 EA in the domestic market each month and all the feedback is excellent. It?s the hottest product. All the frames are made from Ultem PEI in a state of the art production facility. Our ultem and metal frames are Lightweight, high elasticity , eco friendly, and superior fit, you can feel the comfort even during long-term wear. We have mold-making process enough to meet your design requirements. You may visit our websit to take a brief look at the products. www.arcosseoul.com Regards,Background InformationUltem PEI material was developed by American GE plastic company.Ultem is a material with the best high-temperature resistance & dimensional stability, chemical resistance, flame resistance and high strength & rigidity. It&＃39;s already used in electronic, medical equipment, automobile, motor, and aviation industries. Ultem&＃39;s big benefit is lighter and more flexible than others.It also provide thinner thickness frame. therefore frame weight sensitive consumer can easily accept it. but a problem is that there are not many good factories that can produce good quality frames from Ultem PEI, although Korean eyewear factories invented it first time. Our products are processed at the state of the art facility with long term professional experience. These lead to good quality with no afterward problems.