DESC: The Black Flys Fly & Loathing Sunglasses have nylon frames that are injected and constructed around a wire core to keep the shape of the frame in any weather. The sunglasses are recommended for sports, motorcycle riding and casual wear. The impact resistant, polycarbonate lenses provide 100% UVA and UVB protection. With hand fitted joints, precision milled hinges and self-locking screws, the sunglasses are solidly constructed for an optimal fit.