SPECIFICATIONS

Usage Scope: Driving,Fishing,Travel,Outdoor,Sports

Suitable For Face: Round Face Long Face Square Face Oval Face

Style: Square

Season: Spring,Summer,Autumn,Winter

Package: Box,Clean cloth,Card,glasses

Origin: Mainland China

Model Number: AL2458BS

Lenses Optical Attribute: Polarized,Photochromic,UV400

Lenses Material: Polycarbonate

Lens Width: 62mm

Lens Height: 42mm

Item Type: Eyewear

Gender/Ages: Men,Women

Gender: MEN

Frame Material: Alloy

Frame Feature: Stylish Comfortable And Not Easily Scratches

Eyewear Type: Sunglasses

Department Name: Adult

Certification: CE

Brand Name: LIOUMO

An important note about photochromic lenses:

Because they react to UV light and not to visible light, there are circumstances under which the darkening will not occur. Frist example, is in your car. Because the windshield blocks out most UV light, photochromic lenses will not darken. Second,is indoors test with ordinary lighting(Because the lighting used in daily lighting does not contain ultraviolet light),photochromic lenses will not darken.

So the ways to activate photochromism is:

Exposed to UV rays, as in direct sunlight OR Use ultraviolet light lamp (not ordinary lighting lamp).This is the way to activate the photochromic function of the product.