Sunglass lenses get smudgy with sweat, skin oil, and water spray. Clean smudgy lenses using the built-in lens cleaner by pushing the lens through the top of the frames, then back while wearing the Sacuba Self-Clean Sunglasses. The unique microfiber material traps the dirt, water, and other liquids. With interchangeable lenses, and at $79, Sacuba Sunglasses are perfect for all uses.