A very clever concept, and we've no doubt that this idea is destined for greatness. Now...interchangeable lenses on sunglasses are nothing new, after all, that is how Oakley got their start. However, the frames have always remained the same while the lenses have changed their shape. Uniqbrow goes the other way, having the same basic lens that interchange with some hip frame options. Different shapes to suit your mood, but also different colours to match your wardrobe...if you're into that whole matchy matchy thing. You can go here to learn more.