for more information about Julbo lens technology. Lightweight, high-performance glacier sunglasses. Designed for skiing and mountaineering, these inexpensive Julbo glacier glasses feature 100 percent UV protection and reduce visible light glare by 88 percent. Julbo has made some of the best mountaineering glasses in the world for over a century, so you can count on a durable design and quality workmanship. Polycarbonate lenses with mirrored blue finish are shatter-resistant. Leather side flaps eliminate glare. Lens size: 54, bridge 19. Temple: 110, base 6. Lenses: Spectron X5. Measurements: Eye Size: 52 1 1 mm Bridge: 13 4 5 mm Temple Size: 122 2 13 mm Weight: 1 oz