The sky’s the limit! Introducing the GRAVITYMASTER GR-B300, a piece of aviation-inspired professional gear designed to work even in the harshest environments, from the G-SHOCK MASTER of G-line. The GR-B300 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 p

G-STEEL GST-B300 The GST-B300 is the first G-STEEL watch with a front button, which adopts a new Carbon Core Guard structure that delivers superior shock resistance by leveraging the lightness and outstanding rigidity of carbon fiber. | CASIO G-SHOCK