The prescription-ready sports Slam Goggle delivers excellent visibility both indoors and out. Play confidently and be protected with the Slam Goggle, which meets or exceeds ASTM F803 impact resistance for several sports such as basketball, soccer, squash, lacrosse, tennis, and more. Features: Unisex shape Sizing allows for teen and adult fitting Meets or exceeds ASTM F803 impact resistance for several sports Patented eye rim assembly and 6-base lens curve design allows for a wide range of prescription lens powers Front padding incorporates venting for increased airflow 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 52 (M) 33.5 53.3 17 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 (M) = Medium Fitting All measurements in millimetres (mm)