The Oakley SI Speed Jacket is designed with direct input for those individuals it is designed for. Law enforcement and competitive shooters provided feedback in the design of this frame. Don't be fooled by the modern and casual look. This frame is all business. The Speed Jacket meets ballistic( MIL-PRF-31013) standards. A wraparound fit gives you total coverage and a wide peripheral view while the Unobtanium nosepads keep the frame in place if you break a sweat. The thin temple stems andthree-point fit system make it comfortable and compatible with a hat. Whatever your needs are, the SI Speed Jacket delivers.