Men’s Round Steampunk Sunglasses from SeaDog Jack. Lenses made of Polycarbonate. Your choice of Mirrored or Non-Mirrored. Anti-Reflective lenses. Frame made from copper. Full UV400 protection against harmful UV rays.
What is UV400 Protection?
So you keep seeing the rating “UV400” in the specs for the sunglasses you’re shopping for, but what exactly does that mean? Here’s a simple explanation from the SeaDog Jack Blog page.