One of the common problems with glasses (for opticians and wearers alike) is the delicate hardware combination of joints and screws that are easily knocked out of alignment or loosened even with a small bump or drop. By utilizing a super-elastic metal called nitinol, an innovative shape memory alloy, this design possesses springy, rubberlike flexibility without sacrificing strength and durability. No more lost screws or crooked frames and fewer trips to the optician!