Smith Optics Outside the Wire Goggles Replacement Lenses will let you maintain your military goggles in top condition. The ballistic lenses of the Smith Elite Outside the Wire Goggles are as close to indestructible as Smith Optics can make them, but in the field, even the most ultra-tough goggles lens can become worn over time. It's no problem with these replacement goggle lenses. The replacement lens easily switches out with your existing protective lens using the same interchangeable lens system built into the Outside the Wire Goggle.