Technology | 3Fvision

Models marked as Anti−fog are protected by anti-fog technology.
Anti-fog is a special layer against water condensation, which prevents the lens from fogging up. The Anti-fog layer is sensitive, therefore please clean the inner part of the lens with a dry, soft fabric only.

Use of a double lens creates a layer of thermo-insulating air in the ocular, which significantly works against lens fogging. On the same token, it considerably increases the impact resistance.

The regulation system DUAL DIAL FIT enables the comfortable and secure fit of the helmet on the head.
It consists of a ring encircling the head and a regulating wheel placed in its back part.

Inner part of the ski goggle frames 3F is provided with an EVA foam layer, which guarrantees a high level of comfort. All used materials on the glasses are anti-allergen.
EVA = ethylenvinylacetate – soft foam with high density and shape memory.

Some models of 3F helmets are made using the IN-MOLD technology, when the EPS foam is injected straight into the shell and both layers create one unit. This technology is remarkable for its high firmness at low weight and is mainly suitable for children´s helmets, where the weight plays a significant part when burdening the child´s cervical spine.
In-Mold = the best current production technology for making light helmets with a high level of firmness and maximum protection. Injecting EPS foam directly into the polycarbonate shell leads to a tight connection of both layers, which enables e.g. to extend air vents while maintaining the maximum safety of the product.

Over the glasses usable.
Models marked as photochromic are equipped with self-tinting lenses.

Models marked as TR 90 have their frame made of Grilamid.
Grilamid TR 90 is a very light, flexible and resistant polyamide, which exceeds the classic polycarbonate or nylon in its qualities and in a fundamental way influences comfort, safety and resistance of the whole product.

Photochromic lenses get darker according to the intensity of the sunshine from the categories 1 to 3 according to the current climate conditions.

Models marked as polarized are equipped with a horizontal polarizing filter.
Polarization – is a special finish of lenses, which remarkably suppresses reflected light. They improve visibility especially on the sea and snowy surfaces; they are great also for drivers – wet roads do not reflect in the sun.

Glasses 3F are equipped with normalized sunfilters in the scale of 0−4.
Category 0, clear or slightly tinted filter, light transmission 80 % – 100 %

Glasses 3F are equipped with normalized sunfilters in the scale of 0−4.
Category 1, slightly tinted filter, light transmission 43 % – 80 %

Glasses 3F are equipped with normalized sunfilters in the scale of 0−4.
Category 2, medium dark filter, light transmission 18 % – 43 %

Glasses 3F are equipped with normalized sunfilters in the scale of 0−4.
Category 3, dark filter, light transmission 8 % – 18 %

Glasses 3F are equipped with normalized sunfilters in the scale of 0−4. Filter No 4 is not reccommended for driving and can be used basically only for mountain hiking.
Category 4, very dark filter, light transmission 3 % – 8 %

All 3F glasses are equipped with maximum filters to suppress UVA, UVB and UVC radiation.
UV 400 – indicates that the glasses protect eyes against radiation up to the wave length of 400 nanometres, i.e. against invisible and harmful radiation so-called ultra-violet. Visible sun radiation has a wave length from 400 to 780 nm. Next is infra-red radiation with a wave length from 780 nm. UV radiation is harmful for the human body: it causes skin burns and can cause even some eye diseases. It is divided into long-wave radiation UVA (315–400 nm), medium-wave UVB (280–315 nm) and short-wave UVC (100–280 nm). The latter is absorbed by the atmosphere.

Models marked as Vacuum Anti−fog are protected by a technology against glass fogging.
Anti-fog is a special layer against water condensation which prevents the fogging of lenses. The Anti-fog layer is sensitive, therefore please clean the inner part of the lense with dry, soft fabric only. VAF – system of double ocular, technologically modified so that there is a vaccuum between both lenses. In the connection with thorough ventilation and the anti-fog system we reach absolute non-fogginess of glasses under any climate conditions. Currently, only 3F products are equipped with the VAF system.