1. Metal frames give off a conservative appearance and don't block your best facial features.
2. These sunglasses are bendable and thus can be finely adjusted if they feel loose. You can adjust the nose pads on the specs so that they always sit properly on your face.
3. You will have less trips to your optician because metal frames often hold the adjustment better than plastic ones.
4. If you are always on the go, metal sunglasses will suit you since it's lightweight and flexible.
