Photographers use various lenses and filters to achieve the best visual results throughout the day. Doesn't it make sense to do the same thing for your eyewear? The Julbo Magic features a multi clip concept that includes two lenses for optimal clarity and protection throughout the day. The visible light options range from the Category 0 Clear Sight lens which offers 100% UV protection in low light conditions all the way up to the Category 3 Spectron X4 which blocks 87% of visible light. The amber Spectron Hi Contrast is excellent for adding terrain definition in flat light conditions like skiing or hiking on snow in dense fog. All three sets of lenses easily slide in and out of the frame allowing for quick replacement as your visibility range changes.