Ultem is a unique material because of its strength, lightness and flexibility. Approved by the FDA and used in both the medical and aerospace sectors, Ultem offers a unique opportunity: indestructible glasses that are extremely comfortable at the same time. A collection that definitively solves the problem of resistance and durability. But Ultem offers much more! In several PLUG-IN models, they offer an intelligent clip-on system that attaches magnetically to the front. The clip-ons supplied make it possible to obtain different versions of glasses very quickly.