1- The flex hinge not only can be moved in and out , it also can be moved up and down. It can avoid demage no matter applying force to the optical frame in any direction .
2- There is no screw connection between front and temple so they are durable.
3- We use TR90 ring instead of screw in the glass locking block of the front of optical frames. It simply cut the old TR90 ring and replace a new one during changing of lens.
4- The temple tip of eyeglasses is made of silicon , so eyewear will not slide down easily.
5- The designed nose pad can be automatically adjusted according to the shape of the wearers' nose.