UV400 PROTECTION – Lenses block 100% Harmful UVA & UVB Rays. UV 400 indicates an eye protection item that has been optimized to prevent eye exposure to both UVA and UVB radiation. One of the biggest differences between UV 400 protected items as compared to other items that protect against the sun's radiation is the fact that UV 400 protected items are capable of blocking light rays as small as 400 nanometers.
POLYCARBONATE LENSES – Polycarbonate is a durable material. Although it has high impact-resistance, it has low scratch-resistance and so a hard coating is applied to polycarbonate sunglass and eyeglass lenses. Polycarbonate is highly transparent to visible light, with better light transmission than many types of other lenses.