Sunglasses generally come in two different types: metal or plastic. Metal sunglasses are the preferred type of style for many people. Perhaps they like the metal framed look better than their plastic framed counterparts. Many of the top selling styles of sunglasses are of the metal framed type so they are worth looking into.

Often times you will find metal sunglasses that include spring hinges on them. This is an important feature to have with metal framed sunglasses. The benefit of spring hinges over a standard simple hinge is that the spring hinges allow more range of movement and they permit the frames to better fit your face. If you're going to choose metal sunglasses, look into styles that include spring hinges.