HIKING LENSES: A PRIMARY CHOICE
There are four categories of lenses for hiking sunglasses. The intensity of each shade corresponds to particular weather conditions.
Sunglasses adapted to hiking:
- category 3: glasses equipped with category 3 lenses are designed not to dazzle on days when the sun is strong. This protection is ideal for summer and for open country walks (high mountains, ridge trails, etc.).
- category 4: glasses equipped with these lenses are used for extreme sunshine, eg: glacier or snowshoe walking. These high-protection glasses filter out 92 to 97% of the brightness to minimise glare. The glass is very dark.
Less common glasses for hiking:
- category 1: category 1 lenses are very lightly tinted, for use in grey weather, low sun or a dark environment (forest, for example).
- category 2: category 2 lenses are perfect for mixed weather with alternating sun and cloud. In middle or high mountains where sunshine is often stronger, these glasses protect you less from glare than category 3 lenses.