- Frame Material: Made from metals like stainless steel, titanium, or aluminum - Durability: Metal frames are often more durable and long-lasting compared to plastic or acetate frames - Style: Metal sunglasses can have a sleek, modern look and come in various shapes and designs - Weight: Depending on the metal used, these sunglasses can be lightweight or have a substantial feel - UV Protection: Like other sunglasses, metal frames often feature lenses with UV protection for eye safety