Category 4 Lenses





Frame Color: Matt Black Blue – Matt Black Grey

Lenses: Category 4 Lenses

Included: Removable Soft Sponge, Removable Elastic Band, Hard Case

Fit: Man

Sport: Mountaineering, Hiking, Ski Mountaineering

Size: Frame Width: 140mm; Height: 50mm – Rod Length: 125mm; Lens Base: 8

Product Overview


Passion and love for the mountains are born far in time. The rustle of the wind in the trees, the sound of our footsteps along the way, the consistency of the stones under our feet, the feeling we love so much of freedom in the midst of nature, and the satisfaction of having conquered the summit. For those who love to practice mountaineering in the high mountains, they know that eye protection is a need of primary importance that cannot be neglected. It is well known that in the high mountains, mountaineers need not only category 4 lenses that effectively protect against UV rays (stronger than at lower altitudes), but also from the stronger intensity of direct light and that reflected by ice. and snow. DEMON has created a line of mountain glasses with category 4 lenses for mountain lovers, enthusiasts, or just simple enthusiasts. Using mountain glasses with category 4 lenses is now a must for those who like us have a strong passion for the world. Outdoor. DEMON takes care of the health and protection of your eyes, so that you can dedicate yourself to the only thing that really matters, your path and your feelings.



Category 4 lenses are technical lenses recommended for use in the high mountains for the practice of Hiking and Mountaineering, they are particularly suitable for use on glaciers where there is strong snow glare, and the monochromatic white of the ice can be very annoying if a suitable lens is not used. The category 4 lens can also be used outside the strictly mountain range for very intense light conditions, and for subjects who suffer particularly from light. Hiking and Mountaineering: as described above, the category 4 lens was born as a lens for use in the mountains for hiking and mountaineering. The particular construction of the lens is aimed at better protecting the eye from all UV-A and UV-B rays which become much more intense with increasing altitude, due to less shielding from the atmosphere. For the same factor, the sun’s rays and the intensity of light are also greater, and the category lens is the most performing to protect and ensure the constant sensation of relaxation for the eye even for very prolonged use.

The most extreme mountaineering expeditions require the utmost in technology for every equipment needed for climbing. For eye protection, the category 4 lens or the 2-4 photochromic lens (which reaches category 4 exceeded a threshold of light intensity and UV) is generally chosen because if adequate filters are not used, there is a risk of severe irritation to the eyes, which could lead to bring to a stop even a well prepared alpine expedition. It is also important to specify that above a certain altitude, the snow mask is used more than protection from light, to protect a larger surface of the face from the cold to prevent freezing. (Reference is made to extreme expeditions such as Everest, K2 and very high altitude peaks).



TR90 frame: The TR90 is a special composition of Nylon and carbon fiber used by DEMON for the construction of all mountain eyewear frames for Mountaineering. It is a hypoallergenic composition and can be used in extreme conditions even for very prolonged use without irritation to the skin. The peculiarity of the TR90 is its exceptional elasticity and resistance to accidental impacts and mechanical traction, and it is also 20% lighter than frames built with conventional materials.

Generally, a frame built with this special composition weighs between 20 and 45 grams depending on the thickness of the frame. Performance is DEMON’s number #1 goal. Choosing glasses with a TR90 frame is the choice for those who want maximum performance, and are constantly looking for technical materials that guarantee comfort, safety and aesthetics. The TR90 has a feature called memory, in fact when you wear the glasses it adapts to the face gently deforming its shape to return to its original state when it is removed. This feature is fundamental, in fact the glasses retain memory even at low and high temperatures without deformation. TR90 is also a material with a long lifespan, in fact it has been shown to have greater resistance over time than frames built with other conventional plastic materials.

Non-slip rubberized parts: The rubberized parts are in soft non-slip “Megol”, an ultra-light hypoallergenic material that makes weight the main feature.

The rubberized parts are designed to increase the comfort of Alpinism eyewear and prevent all those annoying micro slips of it towards the tip of the nose, especially in the most insidious passages where maximum stability of the glasses to the face is required.

Sweat sponge: The sweat sponge for mountain glasses is made of high density hypoallergenic material. A Must for mountaineers, in fact it has the task of carrying out several functions:

– Protection from sweat: It prevents drops of sweat from coming into contact with the eyes in the phases of great fatigue.

– Protection from air and projections: Prevents air or any projections (Ex: Dust) from coming into contact with the eyes.

– Light Protection: Prevents lateral light rays from coming into contact with the eyes, preventing correct vision.

The sweat sponge is removable at will, it is used by the mountaineer or hiker as needed.

Soft sponge MAKALU model

Elastic cord: A removable elastic band is supplied for the EIGER model.

It is made of elastic material to promote comfort and stability of the glasses even during the most critical conditions and difficult passages. It also makes the glasses more stable and closer to the face during use, to more effectively protect the eyes from: air, cold, dust and various projections that the athlete may encounter during their journey.

For mountain glasses Mountain glasses with photochromic lenses for Mountaineering and Hiking guarantee maximum performance without any kind of sacrifice.

Elastic Band for Mountaineering and Hiking Sunglasses

The measurements of the EIGER glasses are:

Width: 140mm; Height: 50mm – Rod Length: 125mm; – Lens Base: 8

Products are always shipped in their original packaging. For some models, the color or shape of the case may differ from that shown.


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Category 4 Lenses

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