Slim rectangle sunglasses first debuted in the mid 1960s, they became wildly popular again in the 1990s, and are now officially timeless. San Fran Slim sunglasses combine retro styling with modern sustainability. These frames are simple and familiar, yet sophisticated and unique. A true mix of tradition and modern innovation. Designed to complement any wardrobe with three available color options. With full UVA/UVB & glare protection. These sunnies are light-weight, comfortable, and durable for anything you get up to outdoors.Made with:. 33% less CO2e Emissions. 34% less water usage. 82% less waste compared to conventional sunglasses