Zeal Optics Zeal Z3 Gps Goggle GPS Integrated Goggle with second generation, real time, head mounted display and softwear functionality GPS and online functions include speed, distance, altitude, vert, temp, run count, jump time, and position In-molded permanent anti-fog lens Flexible frame and highest quality materials for fit, comfort, and durability, medium to large fit Integrated rechargable battery, usb connectivity, free online community and software interface