Ray-Ban RB2180 Round Sunglasses are the second coming of the round lens look, made modern with cool new colorways and gradient lenses Ray-Ban combines classic American styling with cutting edge technology to become one of the most popular and recognizable eyewear brands in history Full rim frame made of lustrous, lightweight Acetate; hypoallergenic & durable Flattened saddle bridge For men, or women after an over-sized look Round lenses will suit most face shapes 3-dimensional metallic Ray-Ban logo on the temples Distinctive Ray-Ban shark fin contour to temples Trademark metal rivets on end points Sturdy 3-barrel hinge Available in various vibrant frame and lens combination to personalize your look Available with a prescription here Authentic Ray-Ban merchandise Come in a Ray-Ban protective carrying case with a cleaning cloth. These sunglasses are available with a mirror coating option on certain colors. Mirror coatings are suitable for protection from intense light. A mirror coating reflects back light and reduces the amount of light passing through the lens. This makes it more comfortable for eyes in very sunny conditions.The sunglasses are available on certain colors with gradient tinted lenses - Gradient tints are tints that start off at a darker color at the top of a lens and then gradually lighten towards the bottom of the lenses. These tints are great for fashion and for reading outside on sunny days. Gradient coatings work by allowing an appropriate amount of light to filter through in certain areas and less in places where protection is most necessary.