EDGE COVER REACTIV
The ultimate sunglasses for mountaineering enthusiasts. Protection, style, and technicality combined to conquer the peaks.


Sunglasses equipped with the REACTIV 0–4 High Contrast lens are designed primarily for high-mountain environments. Photochromic (cat. 0 to 4), it offers maximum range, from a very light tint in low light to extreme protection in full sun and at altitude. High Contrast technology enhances terrain definition for ultra-precise ground reading, even in mineral and highly contrasted environments. Ideal for mountaineering and high-altitude expeditions, it guarantees 100% UV protection.
5 products
The ultimate sunglasses for mountaineering enthusiasts. Protection, style, and technicality combined to conquer the peaks.


High mountain men's sunglasses


High performance sunglasses for the mountains


High mountain men's sunglasses


High mountain sunglasses


Photochromic sunglasses feature lenses that can automatically change tint depending on ambient light intensity. These intelligent lenses are engineered with special molecules that react to ultraviolet (UV) rays from the sun. The more UV exposure there is, the darker the lenses become, and vice versa.
The principle behind photochromic sunglasses is based on a chemical reaction involving photochromic molecules embedded within or applied to the surface of the lens. When exposed to UV rays, these molecules change structure, causing the lens to darken. Once UV exposure is reduced or absent, for example, when you move indoors or at the end of the day, the molecules return to their original state and the lens becomes lighter again.
One of the key advantages of photochromic sunglasses is their automatic adaptation to changing light conditions. This provides continuous protection against light and UV rays, while eliminating the need to switch glasses or lenses depending on brightness. Whether you're in full sun or in the shade, photochromic sunglasses guarantee optimal vision and the right level of protection.
The world of sunglasses is experiencing a revolution: photochromic lenses. With Julbo’s exclusive REACTIV technology, discover an unparalleled visual experience in all weather conditions:
With NTS technology (Non Temperature Sensitive), REACTIV lenses adapt independently of temperature. At Julbo, we constantly push the boundaries of innovation for your comfort.
At the heart of Julbo’s brand promise lies the perfect fusion of advanced technology and exceptional craftsmanship. Discover the technical features that make our photochromic sunglasses incomparable.
Choose between polycarbonate and Trivex. While polycarbonate stands out for its lightweight construction and durability, Trivex delivers unmatched optical clarity, combining thinness with outstanding impact resistance.
Our lenses are categorized to suit both extreme and moderate light conditions. Visible Light Transmission (VLT) is a key indicator, ensuring the right level of protection for every environment.
Each Julbo lens benefits from premium treatments designed to enhance your experience. The anti-reflective coating eliminates visual distractions, while the flash coating provides a striking mirror effect. Our lenses are also treated with an anti-fog coating for consistently clear vision, and an oleophobic coating to prevent smudges and make cleaning easier.
At Julbo, innovation is everywhere. Integrated ventilation prevents fog formation, ensuring uninterrupted clarity. Grip Nose guarantees a secure hold, even in the most demanding situations. And our Grip Tech temples deliver exceptional comfort, adapting to all face shapes while ensuring optimal stability.
With Julbo, every detail matters. It is this uncompromising attention to detail that positions us as a leader in the world of photochromic eyewear. Choosing Julbo means choosing the perfect alliance of protection and performance.
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