Julbo Revolution OTG Goggle Cylindrical Lens Shape with Anti-fog Lens Treatment Exceptional Air Flow, Anatomic Frame and Easy Clip OTG Foam: Specific foam that contours to accommodate prescription glasses with thermomoldable double density foam and soft touch material on contact zones. Extended outrigger : 15 mm extension on each side of the goggles to adapt to all helmets & guarantee uniform hold on the face. NXT Camel Lens: Pure all-terrain vision. Photochromic: (category 2 to 4). Polarizing: eliminates glare for better reading of relief. Brown color: protection and contrast enhancement.