Don't let the name fool you, Oakley's Standard Issue Half Jacket 2.0 sunglasses are the full package. If you need a pair of shades that are not only stylish, durable and lightweight, but also have the ability to swap out lenses easily and quickly, you need the SI Half Jacket 2.0. You shouldn't have to compromise with your eyewear, and with SI Half Jacket 2.0 you won't have to.