Bold and ultra-modern, the G-Shock GA-2100-4A stands out with its striking all-red design and rugged carbon core guard structure. Known as the “CasiOak” for its sleek, octagonal bezel, this watch combines analog-digital functionality with legendary G-Shock toughness. With features like 200m water resistance, world time, stopwatch, and LED backlight, it’s built for both urban style and outdoor endurance.