[GRILLE=2566] These new glasses incorporate magnetic technology that makes it quick and easy to swap screens without risk of breakage just before your ride or race depending on light conditions. Thanks to two powerful magnets arranged on the uprights, the glass is easily positioned and stays perfectly in place during sprints or on rough surfaces. [GRILLE=2564] Additional screens offer the greatest versatility of use The category 3 screen, with its low light transmission, is ideal for sunny outings; the category 2 screen is ideally suited to overcast or uncertain weather, so as to improve contrast; the category 0 screen is best suited to fog or night conditions. [GRILLE=2565]