Been searching high and low for a lens that offers maximum clarity Look no further the Tifosi Seek FC Photochromic Sunglasses give you that and more. The Fototec photochromic technology automatically lightens or darkens in response to changing light conditions, giving you exceptional clarity. The polycarbonate lens is shatterproof and scratch resistant, and shields your eyes with 100% UV protection. The Grilamid TR 90 high impact frame resists chemical and UV damage, while the adjustable nose and ear pads provide a comfortable fit and prevent slippage. And when your adventure seeking is over for the day, keep track of your sunglasses with the included bag and case, so you don't have to go searching for them the next day. Proposition 65 Warning for California Consumers: This product contains chemicals known to the State of California to cause cancer andor birth defects or other reproductive harm.