Typically glasses come in two main style materials: metal and plastic. Well, it is hard to say which kind of glasses is best or wonderful. But on the other hand, distinguishing between different glasses frame materials can make a large impact on your subsequent style choices. One typical trait to plastic eyeglasses or sunglasses is that style of the frame will generally be thicker than that of a metal frame. And also, Plastic frames cover basically the entire spectrum of fashion styles. For instance, they can easily be used for small children, with eccentric designs, characters, colors, and shapes. So in my opinion, you can choose plastic ones which can last longer.