The team at William Painter has taken the utmost care and consideration when choosing the best materials to make the most durable sunglasses possible. William Painter’s are made from a combination of aerospace grade titanium and durable, flexible acetate to the best fit and comfort while still able to take a beating.Each pair of William Painters come with top of the line CR-39 polarized lenses. They have fantastic optical quality, with lightweight lenses for a balanced feel, not to mention more durable than heavy glass lenses. You can also switch out the lenses to meet your optical requirements. With William Painter glasses, you get all of the cool without any of the bad with the ability to open 1,000's of bottles without a scratch or chip because of our black armor coating technology which is also used on military grade weapons.