The Rallye is our latest celebration of timeless design, quality, and craft for the world to enjoy. 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 a century. The lenses are manufactured in Calvados, France, through a process that begins with organic materials like sand and ash. This mixture is heated, melted, and hardened into a mountain-ready glass. The lenses are then painstakingly polished to achieve the highest possible level of clarity for the user. The result is a distortion- free, scratch-resistant lens that is both ruggedly durable and infinitely recyclable. Like all Obermeyer products, the Rallye sunglasses are truly made to last a lifetime.