http://tinyurl.com/ksbjudnZeal Optics Zeal Z3 Gps GoggleProduct Review Click on the link for more reviewsGPS Integrated Goggle with second generation, real time, head mounted display and softwear functionalityGPS and online functions include speed, distance, altitude, vert, temp, run count, jump time, and positionIn-molded permanent anti-fog lensFlexible frame and highest quality materials for fit, comfort, and durability, medium to large fitIntegrated rechargable battery, usb connectivity, free online community and software interface