High Impact meets Rx. Low-profile, ON or OFF Duty, and with lens exchange, HNBL is an eyewear platform for everyone. The first frame capable of supporting Ballistic Rx, HNBL was designed to support the soldier, officer, or recreational enthusiast. Oakley SI Ballistic Rx is the first time a prescription lens is capable of passing all ballistic impact requirements. In a world where almost 75% of the population wears corrective lenses, Ballistic Rx brings protection and safety to a valued group of our community.