The Swingarm is lightweight and heavy duty. Purpose built around the innovative double action hinge system, offering uncompromising fit and function. Frame: 6 base mold injected Grilamid frame with an innovative double action hinge system. Optics: 6 base Melanin infused Polycarbonate lens. 100% UV protection. Up to 98% Blue Light protection. Measurement: 49h - 140w - 135l. Weight: 29grams. Material: Plastic, Polycarbonate.