Ray-Ban - RB3708 Chromance series of Ray-Ban sunglasses are a must-have for your summer accessory collection. The metal frame with gunmetal frame and grey lenses is both lightweight and durable, making it a great choice for active lifestyles. The frame's design is modern and stylish, so you'll always look polished and put together.Category 3. General purpose sunglasses. High protection against sunglare, good UV protection, not suitable for driving at twilight, at night or under dull light.