How to know about the light transmittance of the ski goggles

It is recommended to choose double lens (more impact resistant), inner piece permanent anti-fog. Fit comfortably with face tape and helmet, The selection of light transmittance or sheet color should be coordinated with the use of weather, general brand ski goggles labels, hanging CARDS, packaging materials, etc. have light transmittance signs, S1 ，S2，S3（Cat.1, Cat.2, Cat.3), ski goggles with clear lens or S1 and polish lens are recommended for night skiing.