Julbo Naomi Kid's Sunglass, Spectron 4 Lens, Crystal Pink, 6-10 Years Wrap-around shape for good peripheral vision and protection Cord Attachment: allows attachment of a cord; Cord not included This lens in very dark w/only 5% visible light transmission and a protection index of 4; It has a flash finish and anti-reflective coating This lens in very dark w/only 5% visible light transmission and a protection index of 4; It has a flash finish and anti-reflective coating