The prescription-ready Slam meets or exceeds ASTM F803 impact resistance for several sports such as baseball, basketball, soccer, tennis, and more. It also meets ASTM F3077 for impact resistance for Women’s Youth Lacrosse 45mph and lower. Designed with TPR over-molding on the eye rims, the Slam provides a more comfortable fit against the face as well as on the temples. Features: Unisex shape Meets or exceeds ASTM F803 impact resistance for several sports Meets ASTM F3077 for impact resistance for Women’s Youth Lacrosse at 45mph and lower Patented eye rim assembly and 6-base lens curve design allows for a wide range of prescription lens powers New dramatic two tone over molded colour treatments Sculpted temple design with coordinating inside padding Front venting padding system Back cushion provides additional cushioning along the top and bottom of the frame Comes with semi-rigid case, cleaning cloth and adjustable strap Prescription Lenses: This frame can be purchased with prescription lenses. For online orders, we offer single vision polycarbonate lenses with anti-reflective coating. Customers also have the option of selecting the following customizations: Add Optifog® anti-fog coating to your lenses for clear vision under a wide range of indoor and outdoor environmental conditions Upgrade your lenses to Grey or Brown Transitions® to adapt seamlessly to changing light conditions Sizing: A B ED DBL TL 49 (S) 32.5 51.4 17 135 52 (M) 33.5 53.3 17 135 A = the horizontal measurement of the lens B = the vertical measurement of the lens ED = Effective Diameter defines the minimum diameter lens that will fit a frame when the geometric center of the lens is exactly centered in the frame DBL = Distance Between Lenses or the bridge size TL = Temple Length (S) = Small Fitting (M) = Medium Fitting All measurements in millimetres (mm)