Tifosi eyewear aethon fototec night lens sunglassesautomatically adjustable coverage, high performance sports sunglasses that are engineered best for low lighting conditions.frametifosi eyewears aethon sunglasses have a grilamid tr 90 frame construction that offers durability while keeping the glasses lightweight and flexible. Enhancing your comfort, the nosepiece and earpieces are adjustable to create a customised fit. For additional stabilisation the components are coated in a hydrophilic rubber.lensthe fototec night lens comes with a variable light transmission that ranges from 27.7% to 75.9%. The lenses adapt to your environment ndash darkening in bright lighting environments and lightening during low lighting environments. Automatically adjusting the transmission to provide the best possible coverage you never have to worry about changing lenses. The lenses themselves are made from polycarbonate that offers maximum impact resistance with glare guard lens technology, full uv protection and a decentred positioning for a restful vision experience. Featureslight night fototec27.7% to 75.9% light transmissionadjustable ear pieces and nose piecescomes with protective caseglare guard lens technologygrilamid tr 90 frame constructionhydrophilic rubber components help to stabilise the glassesoptically decentred lens positionpolycarbonate lenses offer maximum impact resistancefull uv protectionventilated lensesbuy tifosi eyewear sport sunglasses from chain reaction cycles, the world's largest online bike store.