BTWIN Kids’ Photochromic Cat 1 To 3 Cycling Sunglasses

We have designed these sunglasses for regular mountain biking and road cycling in all weather conditions.Perfect for children aged 8 to 10.These sunglasses have photochromic lenses that automatically adapt to the outdoor light levels. The wrap-around shape protects the eyes from the sun, wind and splashes.

Photochromic lenses

Category 1 to 3 photochromic lenses

In cold weather (under 10°C), the tint changes far less.
Standard: ISO 12312-1.
Full UV protection filter

Material: impact resistant polycarbonate.

Full coverage for optimum protection from the elements (mud, dust, insects, etc.).

PHOTOCHROMIC TECHNOLOGY

Photochromic lenses automatically adjust to light intensity.

Lenses darken in approximately 30 seconds (takes 45 seconds to lighten).
The perceived brightness does not change much even when the outside brightness level changes.
For example, when cycling, the change in tint is almost imperceptible.
The tint adjusts gradually, and the eye adjusts to it.
The lenses tint faster in cold temperatures.