What type of frame combines both metal and plastic materials?

A combination frame is designed specifically to incorporate both metal and plastic materials in its structure. This design allows for the advantages of each material to blend seamlessly; for instance, the metal may provide strength and durability while the plastic can offer comfort and a variety of colors or styles. The versatility of combination frames makes them appealing to consumers who desire an aesthetic and functional balance in their eyewear. Therefore, the framing style that combines these materials effectively is appropriately categorized as a combination frame.

On the other hand, full-rim frames typically consist entirely of one material, either metal or plastic, and do not feature a blend of both. Plastic frames are exclusively made from plastic, and half-rim frames usually employ a minimalistic design that either partially surrounds the lenses or completely omits them at the bottom, often using only one material for their construction. Thus, these options do not fit the definition of a frame that uses both metal and plastic.