Optimal visibility and next level style, the B-1 Chromic Goggle was designed to work in unison with your low profile Bern lid. The tint color of the photochromic lens will adjust to dark or light conditions. When the UV exposure is strong, the lenses darken gradually. Conversely, when it is weak, the lenses gradually regain their clear state. Photochromic technology provides increased visual comfort with light spectrum filtration indices ranging from 1 to 3 suitable for sunny and cloudy days. See for yourself why the B-1 Goggle is the ultimate winter accessory for your Bern lid. Fog and Scratch Resistant: Fog and Scratch Resistant lenses EN174:2001: Complies with personal eyewear standard EN174:2001