The metal frame contains nickel due to production process. Customers with a history of nickel allergy should be cautious when purchasing.
Made of metal and acetate, the frame is embedded with a magnet to hold up the clip-on. Features: A pair of glasses designed for multiple uses to switch between optical glasses and sunglasses in just a snap.
Note: This type of product is not designed for lenses with high powers, i.e.: +400/-600 or above. For a comfortable wearing experience, high powers need to be matched with higher indices.