The Colorful Belay Glasses are the same at Y & Y's Classic prism glasses, except they come in colors that match your harness, shoes, or rope. Prism glasses help belayers reduce neck strain by allowing them to look straight ahead and still see their climbers. Prism lenses provide a high-optical performance for a clear, non-reversed image. The sturdy stainless steel frame features flexible alloy inserts to fit any face shape, and there are adjustable pads at the nose and temple to stay secure even when you work up a sweat during gripping moments.