YandY ClipUp Belay Glasses Clip-On for use with Traditional Glasses or SunglassesClip On Belay Climbing Glasses Light and Durable Plastic Frame, only 30g reduces extra weight on the glasses Trapezoid Shaped High Transparency Prisms giving a wider vision on the climber and good peripheral vision Flip Up and Down giving an on and off position without having to remove them. Comes with Durable Case with a Carabiner, Lens Cloth and Ear Hooks to securely fit to a harness. Clip on to Any Prescription or Sun Glasses quick and easy to clip