The M3 collection is made of TMi, a synthetic material that is particularly lightweight, durable and flexible. A titanium bridge enables the lenses to be inserted without heat. In the case of strong optical correction, the slot located at the front and the somewhat more pronounced depth of material both serve to conceal the thickness of the lenses. The temples can be easily heated and adjusted, while silicone coatings provide a comfortable fit. Special screwless hinges connect the front with the temples.