Allows maximimum light transmission without changing or distorting sigh or colors. Suitable for indoor or low light conditions. Specifications Model Number: 3024AF Style: Blade Lens: clear Temple Width: 130 mm Base Curve: 10 Frame: Frameless frame color: Black Temple Frame Material: Polycarbonate Mold Type: Private Mold Modeled After: Stand Alone % of light that passes through: 91% Frame Type: black temple Features: CSA Approved All glasses include a Black micro-fiber storage bag and a 3/16" adjustable woven cord