Designed for performance on and off the bike, the Define sunglasses are the epitome of POC's functionality and active heritage, with a lightweight Grilamid frame for flexibility and durability and hydrophilic rubber coating at the temples and noseband to keep the glasses in place during intense activity. With Clarity lens technology, the lenses regulate the colour spectrum for improved contrast and colour display in MTB or city riding.the lens is shaped to allow the use of corrective lenses. The Define sunglasses are designed for use on the trail, but are also functional in everyday life and fit seamlessly with the Axion helmet.Carl Zeiss lensesCarl Zeiss has been recognized and valued for over a hundred years for its first-class optical expertise in lenses, medical equipment and optics. The Carl Zeiss lenses from POC are made of polycarbonate (PC) and have excellent optical performance. All combinations of tints and mirrors have been carefully selected to minimize internal glare and take full advantage of the basic tint benefits.Clarity SunglassesClarity lenses redefine vision while driving. Developed by POC in collaboration with Carl Zeiss Vision Sunlens, Clarity lenses filter specific waves in the color spectrum to improve the precision of vision. The lenses intensify color and contrast and are specifically designed for different driving environments, especially city, trail and road.