Oakley's SI Ballistic Crosshair aviators blend style, comfort and practicality for an ultra-lightweight pair of shades. The ergonomic, hi-modulus C-5 frame is built to sit securely on the ears and the thin stems are comfortable enough for use with a helmet as well. Patented Plutonite lenses are designed with High Definition Optics to maximize clarity and protect eyes from harmful UVA, UVB and blue light up to 400 nanometers. There is also an anti-fog coating on the lenses to prevent heat, haze and humidity from clouding the field of view, while a scratch-resistant coating on the outside ensures lasting lens durability. These glasses can also be worn with helmet-mounted night vision goggles.