DESCRIPTION: The Julbo SLACK is bold, brazen and versatile enough to adapt to every occasion. Lightweight and supercomfortable to wear, with a double-bridge frame design that’s both audacious in style and ruggedly reliable. Available to buy in three different lens options, including high res Spectron HD, a polarized lens that amplifies detail, enhances contrast and color and reduces ocular fatigue for all-day comfort. Also available with Spectron 3 and Spectron 3 Polarized. Designed to fit wider faces. Frame width: 138mm Bridge width: 20mm Temple length: 135mm Lens width: 52mm Weight: 22g Size: L TECHNICAL FEATURES Curved temples: Ergonomic profile for good grip on the face and head. Double Bridge POLYCARBONATE GLASSES (SPECTRON) Spectron polycarbonate lenses are light and offer good shock resistance, making them suitable for all outdoor sports. Cat. 3 polycarbonate lens (visible light transmission rate: 12%) with colored mirror coating (Color Flash): improves filtration of visible light by applying a mirror effect to the lens. A multipurpose lens is suitable for all uses. Versatile use in sports and everyday life. Sun protection: Cat. 3VLT (visibility light transmission) : 12%Material: Polycarbonate POLARIZED LENSES Polarized technology eliminates glare on the surface of the snow thanks to a polarizing filter, ensuring optimal reading of the terrain. Cat. 3 polycarbonate lenses (visible light transmission rate: 11%) with polarization and flash finish. Suitable for all types of sea or mountain sport, blocking glare on the surface of snow and water. Glare protection: A clear view of the water or in the mountainsSun protection: Polarizing cat. 3VLT (visibility light transmission) : 11%Material: Polycarbonate