ENGO 2 eyewear for endurance athletes incorporate a display for real-time performance data in the natural field of view. ENGO2 connects directly to a sports watch (e.g., Garmin, Suunto, Apple), to a cycling computer, or to a smartphone. Athletes can organize data types into custom dashboards based on personal preferences and objectives. ENGO 2's dashboards are highly intuitive to use, and empower athletes to achieve their goals without the friction or distraction associated with watches, computers, or phones when running or cycling.