Bertoni sunglasses for sailing, windsurfing, water ski, jet ski from, floats and all other water sports are indicated for people who spend a lot of time in contact with the sun and the water. Those who practice these sports, in fact, need glasses with polarized lenses on the one hand to protect the eyes from splashes and other eliminate the reflections of the water to ensure the clearest vision. Another key feature is the anti-fog treatment, which prevents condensation from forming on the surface of the lens. Some frames like P1000 and P545 are made in TPX, an unsinkeable material. Most part of our frames are made in anticrash PC or TR90. TR90 Grilamid® is a special nylon studied for frames used in sport activities. It offers extreme strength although it is light and flexible adapting itself perfectly to the face. It has a "memory" which keeps its shape and elasticity even in extreme temperatures.