Having difficulty seeing while changing small flies or tippets? Our popular HatEyes feature a stainless metal frame that hosda a powerful lens to aid 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 lens powers, give our HatEyes a try and see for yourself the difference they make!