From G-SHOCK, the watch brand that is constantly setting new standards for timekeeping toughness, come new G-STEEL models that feature Carbon Core Guard structures. The bezels of GST-B200X are made of lightweight yet very rigid carbon material for the ultimate in shock resistance. Highly scratch resistant clear sapphire glass is used for the crystal to enhance readability and appearance, and to provide both toughness and good looks. In addition, hefty urethane bands feature a sporty outer surface pattern that integrates well with the textured pattern of the bezels. The case is made of fine resin that incorporates carbon fiber for light weight along with rigidity that is superior to that of resin alone. In addition to features that prevent damage and deformation due to impact, G-STEEL Series models also boast compact configurations. Even though these models have dynamic wide faces, they are also designed to provide a comfortable fit on the wrist. The light-on-dark LCD contributes to both functionality and face design. All of this and more adds up to a powerful and tough-looking design. Compared to the GST-B100 Series, the 12-6H is 4.8 mm thinner, while the 3-9H is 4.4 mm thinner.