The Pit Viper The Blacking Out Flip-Offs Sunglasses are shield sunglasses that virtually say 'talk to the hand' without ever having to open your mouth. The all-black styling is mysterious in itself, but when you flip up the lens to give someone the stink-eye, they'll really know you mean business. When they're in shades mode, your eyes are treated with 13.5% light transmission and 100% UVA and UVB protection from the sun.