The Leupold Switchback is your go to shooting performance glasses that you wear all day long. It's design allows the glasses to sit comfortably on your face on the range, in the field or for casual use. It's ANSI Z87.1+ ballistic protection, with lightweight comfort, paired with keen clarity. ////Rx Ready : Compatible with prescription lens requirements. Contact your local eye-care professional for more details on cost and installation of prescription lens.