Flexon brand memory metal is used in the bridge, crossbar and temples and temples of the frame, so the frame keep its shape longer. Temples gently hug the head so lenses stay aligned. No more stretching out of shape, sliding down the nose or constant adjustment. Once Flexon frames are fit, they stay fit. Durable, not indestructible.
Conventional metals kink or break, if bent back and forth.
But Flexon material can be bent back and forth hundreds times without breaking. A premim fit that last. However, Flexon material is not indestructible. It can break if the fronts are repeatedly twisted more than 80 degrees. The benefit of Flexon frames is not indestructibility, it improved fit, comfort and durability.