These men's Khan plastic outdoor-sports sunglasses have a plastic frame and molded nosepieces. Inside this frame, you will find two tinted lenses. The way that these sunglasses are designed makes them seem durable. When the earpieces are thin and attached to the lenses by a flimsy mechanism, the sunglasses themselves tend to break sooner than many people might expect. Because this frame is one continuous piece, you won't have to deal with the glasses' breaking as quickly. The materials used to make these sunglasses are thick enough to last.