Bolle Nova II 21071 Carbon Frame Polarized Citrus Lens Armour Goggles The Boll unique double lens design creates a thermal barrier, while providing exceptional optics and a superior seal. Embedded premium anti-fog layer in the inner lens disperses water molecules across the surface of the lens, restricting moisture build up that can impede your crystal clear view of the terrain ahead. Outer lenses are sheathed in a protective armour to prevent scratches, keeping your lenses and outlook as clear as a bluebird sky. A polarized film that blocks bouncing surface glare. The result is enhanced contrast and a better reading of the terrain. The siliconised strap helps provide total support for the goggle on the helmet.