Change up the look of your Bose Frames to better match your style with these Bose Lenses Rondo in blue gradient. Replacing the lenses on your Bose Frames is designed to be quick and easy, taking just 30-45 seconds to install. All you have to do is pop out the current lenses and pop in the new ones. Easy-to-follow instructions are included to guide you. These new lenses are crafted to block 99% of UVA and UVB rays, and the materials used in their construction are meant to make them extremely resistant to scratching or shattering.