Many goggles feature an interchangable lens system. So do Scott's Combined. The difference is Scott's system is simple enough that you'll actually change out your lenses on the slopes. A sliding track on the right side of the goggle raises the lens. Pop it off, pop in the lighter or darker color (it comes with two lenses that nest inside a slick wallet-like case), and ski. Watch how it works here. The goggles will be out this fall.