The Julbo Bivouak Mountaineering Glasses the world's first sunglasses with magnetic protective shields. Add the magnetic side shields to increase protection against enhanced light reflection, on snow for example, or remove them for regular use. Wide lenses offer optimal coverage. Magnetic side shields are easy to handle, fast to adapt and very durable. Lenses are lightweight Spectron 4 polycarbonate with excellent shock resistance, suitable for all types of sports activities. Block 95% of visible light and 100% UV ABC. Anti reflective coating improves visual comfort by eliminating stray reflections. Flash finish improves visible light filtering with mirror effect lenses. It reflects the rays of light and increases the filter effect. It eliminates the radiation reflected by the outer, mirrored surface of the lens. Natural front airflow thanks to the lens shapemounting structure. Grip tech inserts at stem ends for comfort and hold, does not stick to hair. 360 adjustable temples Stem ends bend in every direction, easy to wear and good hold when worn with helmet, beanie or simply alone. Total coverage for maximum protection in extreme conditions against harsh sunlight. Soft case included. Base: 8. Wt. 32g Made in France.