The flashes on the Big Flash sunglasses are visible from the outside of the lens but invisible for the sunglasses wearer. Ride with style! Big Flash Sunglasses Product Details: <li><strong>Graphic Lenses: Unique application of a flash pattern on the lenses. The pattern is invisible from the inside making sure you have a full see through. <li><strong>UV 400 protection: Blocks UVA, UVB and UVC rays, laboratory tested. <li><strong>Category 3 sunglasses: Can be worn in mixed conditions as well as in bright sun. <li><strong>Made in Italy: Sunglasses are handmade in our boutique manufactory in Italy. <li><strong>Recycled Plastics: Frames are made from recycled plastics collected in Europe, rehashed in Austria. <li><strong>Size: One size fits all. <li>Width at hinges: 14 cm / 5.5 in <li>Temple length: 13 cm / 5 in