Pit Vipers are adjustable, Military designed sunglasses currently up for funding on Kickstarter. Pit Vipers started when the founder began custom-painting Military surplus sunglasses. Pit Vipers are Z87 safety rated, offer 100% UV protection, and are adjustable at three points: lense tilt, ear piece spot, and the nose piece.
www.kickstarter.com/projects/pitviper/the-pit-viper-revolution