[GRILLE=2566] These new cycling glasses feature magnetic technology that allows you to quickly and easily swap out lenses just before your ride or race, depending on the light conditions, without the risk of breakage. Thanks to two powerful magnets placed on the frames, the lens is easily positioned and stays perfectly in place during sprints or on bumpy surfaces. [GRILLE=2564] The 3 lenses offer the greatest versatility of use: - The category 3 lens, with its low light transmission, is ideal for sunny rides; the category 1 lens is perfectly suited for cloudy or rainy conditions; the category 0 lens is best for tackling fog or riding at night. [GRILLE=2565]