Bolle lightshifter xl polarized sunglassesoptimising your vision, the bolle lightshifter xl polarized sunglasses feature a polarised lens that protects your vision from light glare that provides a more restful visual experience, that allows you to concentrate on the detail.keeping your vision clear the lens is protected with four different types of lens treatment ndash anti fog, anti scratch, oleophobic, and hydrophobic'. '.strtoupper('a')dditionally, the lens is vented to help keep the large lens from clouding up during your most intense rides.the s curved temples and themogrip components ensure an ergonomic fit that stabilises the position of the glasses against sweat and high intensity movement'. '.strtoupper('t')he frame is formed from tr90 nylon, which is incredibly durable, lightweight and flexible ndash for long lasting comfort.featuresanti fog lens treatmentanti scratch lens treatmentoleophobic lens treatmenthydrophobic lens treatmentthermogrip componentssnap hingeoptical clip compatiblevented lensess curved templetr90 nylon framepolarised lensxl fit suits larger face shapesbuy bolle sport sunglasses from chain reaction cycles, the world's largest online bike store.