I've had these shades for almost a year and sometimes I forget what the world looks like without them on. They are comfy and they fit my big head perfectly. The polarized lens really help in many situations, such as fishing on a lake, stream, or ocean. They even help when driving into the sun. I like the 580 lens over the 450 lens. I've had both. Buy these glasses or any costa del mar sun glasses if you want a quality pair that will last a very long time.