Ponosoon Sports Sunglasses Glasses Polarized 0815 with 5 Set Interchangeable Lenses for Cycling (blue)

very cool and have an 'insert' for eyeglasses - I assume (since I didn't read the instructions yet - Who does?) they are for adding a pair of prescription glasses into my sunglasses! How cool is that?! They are comfortable and the rubber nose part keeps them from sliding around in the heat. The wrap around shape helps prevent glare too. I have not tried the other lenses because I really like the one it came installed with - the one in the picture.