Now, all you need is one pair of sunglasses for day and night riding! With high demand, now one of the most popular frames, Magnum is available with photo chromic transition lens. Lenses change from clear to smoke or smoke to clear in less than 20 seconds depending on the amount of UV light exposure. We've lab tested these next to Panoptx (now 7eye) which cost $199 (see Diablo), and the Biker Armour magnum actually gets DARKER, faster than the Panoptx! Worn by hundreds of satisfied bikers. Equipped with polycarbonate lenses. FITS SMALL TO MOST OF LARGE HEADS. See how the lenses change below: