Oakley SI Speed Jacket Sunglasses - Versatile and protective, Oakley's Standard Issue Speed Jacket sunglasses were made with direct input from Law Enforcement and Competitive Shooters. With Oakley, all-day fit and comfort come standard, and the Speed Jacket is no exception to that rule. These O Matter,frames are durable and lightweight, while employing Switchlock Quick Lens Exchange technology to help you change lenses easier and faster than before. The High Definition Optics add to these modern frames by ensuring a wide field of view, while the Unobtanium no-slip nosepads keep your shades in place through perspiration. These frames are also designed to accommodate over-ear hearing protection and comms, allowing you to seamlessly go from work to the range without needing to swap them out. When you need a pair of sunglasses that can keep up with you during work or play, you need Speed Jacket on your side. Features Switchlock Quick Lens Exchange Thin Stem Technology for Compatibility with Over-Ear Hearing Protection/Comms Lightweight and Durable O Matter Frame No-Slip Unobtainium Nosepads Meets ANSI Z87.1 2015 Optical Standards for Clarity