If you ride during during the day and during the night, then our Bikershades Anaconda Transition Riding sunglasses is perfect for you. With Bikershades transition sunglasses, you won't have to pack 2 or 3 pair sunglasses again. Bikershades Anaconda transition riding glasses are UV sensitive. The brighter the sun, the darker the lenses will get. So, the lenses will get darker between noon and 5 pm compared to 7 pm. At night, the lenses are totally clear, or yellow. The lenses will not change if you are wearing them inside a car because the car windshield blocks all UV rays. Yellow to Brown vs. Clear to Smoke Lenses: Yellow lenses brightens things up at night and eliminate the halo effect around lights. Brown lenses filters out more blue light in the UV spectrum resulting in sharper vision. Clear lenses provide the most natural vision at night. Smoke lenses filters out more light and reduces more glare. Bikershades Anaconda Transitions are equipped with a sweatproof foam cushion to protect your eyes from wind, dust and debris. The foam cushion also ensures a snugger fit to eliminate wobble and prevent the glasses from flying off. The foam is designed so that the lenses will not fog up while you are riding. You can Compare our Bikershades Anaconda Transitions Riding Sunglasses to competitors which cost 3 times more. Click on products below to view live video http://www.bikershades.com/Clear-to-Smoke-Transition-Lenses-p/pc047phc-brn.htm