Dear Customer, Thanks for your inquiry. The frame#LKFS3656R is made of TR which is referred to as plastic titanium, a memory polymer material frames. TR frames are lightweight, impact-resistance and high temperature. It is colorful and has no release of chemical residues. Please refer to this
link for the frame materials that we have. You can also click the image to have a larger view. Also, the lifespan of eyeglasses not only depends on the quality of materials but also the maintenance. By the way, there are several helpful tips for glasses maintenance. Please click
here to see details. For any further questions or immediate assistance, you may also call our toll-free hotline at 1-855-487-6006 opens every day from 7 a.m.- 4 p.m. PDT. You can also contact us through our Live Chat Support Team: Start a live chat (24/7) or email us at service@firmoo.com. Thank you so much. Please stay safe and healthy!
