Introducing the remarkable Carbon Core Guard Structure! Enveloped within, discover the inner case crafted from exquisite resin merged seamlessly with carbon fiber, ensuring an unbeatable combination of featherlightness and unparalleled robustness surpassing that of ordinary resin. With this advanced composition, rest assured that the internal module remains safeguarded against any harm or deformation caused by sudden jolts. But that's not all! Behold the outer case crafted from the highest quality stainless steel, providing an impenetrable shield against any impact. Adding a touch of perfection, the dual back cover defends the watch's surface from unwanted accidents. Transcending expectations, the GSTB200 series flaunts a smaller case, meticulously designed to offer both snugness and a wide captivating face. Not just functionality, the light-on-dark LCD complements the overall face design, culminating in a harmonious blend of practicality and aesthetic brilliance.