Sizes:
S/M for smaller heads
L/XL for larger heads

Lense Colours: Grey, Orange

Vautron Photochromic Lenses
The Casco Nordic Spirit lenses use Vautron, a unique optical polymer unlike any other. Originally developed for military purpose used in AH-64 Apache helicopter windshield panels. Benefits include: High performance photochromi lenses that have automatic adjustment to varying light conditions. Vautron photochromic lenses get dark up to 75-80% of their initial transmission. And they darken fast - to 90% of their full range in less than one minute. They combine an anti-reflection mirror with the photochromic lense not typically available.

The Casco Nordic Spirit lenses are also optically superior, having a lower refractive index, internal stress than typical sunglasses, resulting in lower surface reflection and "rainbow effect", higher definition and sharper images. The lenses are scratch resistant and do not attract dust unlike typical sunglasses. Best of all the Casco Nordic Spirit is lightweight. On average it is approximately 16% lighter other eyewear.