The skys the limit! Introducing the GRAVITYMASTER GRB300 a piece of aviation-inspired professional gear designed to work even in the harshest environments from the G-SHOCK MASTER of G line. The GRB300 features a Carbon Core Guard structure which delivers the shock-resistance rigidity and corrosion-resistance of carbon material used in aircraft fuselages. The carbon fiber-reinforced resin case and the seamless bezel design inspired by next-generation aircraft come together in a bold and powerful form.