The “leading” innovations are e.g. hinges with plastic injection with more barrels – with this solution called DUPLEX, a smooths and on both sides equivalent temple movement shall be assured. Using the DUPLEX you can “feel” the difference in quality compared to other common solutions. Another strong point is the combination of STABILITY & FLEXIBILITY of spring hinges. In this field REDTENBACHER has brought the DUO-Flex on the market. You will find this & other interesting solutions in the new catalogue of REDTENBACHER.