Having difficulty seeing while changing small flies or tying on fresh tippet? The popular HatEyes Flip-Down Magnifiers from MagEyes feature a stainless metal frame and a powerful magnifying lens to aid focus and vision. Clipped conveniently and firmly to your hat brim, the HatEye's lenses are attached to a swinging extension bar that slides smoothly along its transom, allowing anglers not only the unique ability to adjust their optimal focal length accordingly, but to swing the entire lens assembly up and out of the way when not in use! Available in your choice of several lens powers, give HatEyes a try... and see for yourself what a difference they'll make!