Obermeyer | The Rallye Sunglasses - YouTube。The Rallye sunglasses use hand-crafted, Italian-made acetate. This cotton-based acetate is mixed with acids and polymers to produce lightweight frames that are comfortable during long sessions of use. The frames also feature premier durability, holding their shape through years of continued use. Creating sunglasses this way is a labor of love -- over 700 minutes of craftsmanship and 300 unique steps go into each Rallye frame, hand made in France where eyewear has been at the forefront of quality for over 100 years