[G-SHOCK Mud Master] GG-B100X-1A3DR｜Carbon x quad sensor x Bluetooth, cool khaki green to conquer the extreme land

Casio G-SHOCK Master of G Landline's highest peak,Mud Master GG-B100XNew model in khaki green colorGG-B100X-1A3DRadded in February 2026.
Triple structure of case, bezel, and band made of carbon fiber reinforced resin, quad sensor including compass, altimeter, barometer, thermometer, and pedometer, and smartphone connection via Bluetooth - this is a watch designed to support missions in harsh terrain.

With a tough form said to be inspired by the jerry can of an off-road vehicle, and a khaki green and black coloring, this model has an overwhelming presence outdoors. Furthermore, bio-based resin is used for the main parts of the case, band, and back cover, and the design is designed with consideration for reducing environmental impact. For those who are looking for a watch that can be used as a tool, there is no one that will appeal to you as much as this one.

Even if you line them up or look at them, their presence stands out.

The moment you put it on your arm, it switches to adventure mode.

GG-B100X-1ADR (black model)

GG-B100X-1A3DR (khaki green model)

GG-B100X-1A9DR (gray model)

■ Main features

• Master of G Land:Top-of-the-line model designed for extreme environments
• Carbon fiber reinforced resin case:Robust three-layer structure with shock, dust, and mud resistance properties
• Quad sensor:Equipped with 4 sensors including compass, altimeter, barometer, thermometer, and pedometer (3-axis acceleration sensor)
• Bluetooth cooperation:Connects to smartphone for automatic time adjustment and mission log recording
• 200m waterproof:Waterproof performance suitable for marine sports
• Adoption of bio-based resin:The main parts of the case, band, and back cover are made of resin derived from renewable resources.
• Equipped with Neo Bright:High-intensity LED illuminates the dial even in the dark
• World time:Compatible with 38 time zones (38 cities + UTC)
• Sunrise/sunset time display:Displays sunrise and sunset times for the specified date and location
• 1/100 second stopwatch:Supports 24-hour measurement (including split)
• Fully automatic calendar:Automatically manage your calendar until 2099
• 5 alarms:With daily alarm and snooze function

■Specs

■ "The strongest protection" created by carbon core guard structure

The core of the GG-B100X series is the carbon core guard structure using carbon fiber reinforced resin. While protecting the module in the case body, a gasket is applied around the buttons to thoroughly block mud and dust from entering. Additionally, carbon fiber-reinforced resin is used for the moving parts of the back cover and band, creating a design that achieves both durability and comfort.

The bezel has a structure that combines three layers of fine resin with a carbon fiber insert, which conveys not only the specs but also the tough appearance at a glance. This is a piece that speaks about its seriousness as a tool through its design.

■ “Mission on Earth” supported by quad sensors

The quad sensor installed in the GG-B100X is a 4-sensor configuration that includes a ``triple sensor'' of compass, altimeter, barometer, and thermometer, as well as a pedometer with a 3-axis acceleration sensor. Altitude measurements range from -700m to 10,000m in 1m increments, and manual memory (up to 14 items) and automatic logs are also recorded. The ``Atmospheric Pressure Trend Alarm,'' which alerts you to sudden changes in atmospheric pressure, is a reliable feature for catching signs of weather changes.

The overwhelming reason for Mud Master's existence is that it condenses this much measurement ability into a wristwatch weighing approximately 93g. It is also valuable in the sense that outdoor enthusiasts can start using it on a daily basis with functions that are trusted and used by rangers and rescue teams.

■ “Ease of use” changes with Bluetooth and smartphone cooperation

By connecting your smartphone to the CASIO WATCHES app via Bluetooth, you can operate a variety of functions from your smartphone, such as automatic time adjustment, changing watch settings, and managing mission logs. The mission log is a function that allows you to record a combination of altitude data acquired by your watch and travel route data acquired by your smartphone, and is especially useful for those who want to keep a digital record of their adventures.

It is also equipped with a location indicator and location memory, allowing you to grasp your position in the field where it is easy to get lost. More than just a tough watch, it has the ability to be used as field gear.

■ “How to choose” bio-based resin and khaki green

The GG-B100X-1A3DR's khaki green x black color scheme is highly compatible with off-road and mountain environments. The same series also includes the black GG-B100X-1ADR and the gray GG-B100X-1A9DR, so you can choose according to your field and preferences.

Additionally, the use of bio-based resin derived from renewable organic resources for the main resin parts of the case, band, and back cover is attracting attention as a modern option. This approach of balancing toughness and environmental friendliness is the exact direction of future outdoor gear.

■ Recommended for these people

• Those who are looking for a watch that can fully support strenuous outdoor activities.
• Those who are interested in G-SHOCK Master of G Landline
• People who want to use altimeters, barometers, and compasses when mountain climbing and trekking
• Those who want a khaki green tough watch
• Those who want to record mission logs by linking with smartphones
• Those looking for a G-SHOCK that is waterproof to 200m and can be used in active situations
• Outdoor fans who sympathize with environmental considerations such as bio-based materials
• Those who are looking for a gift for a man, such as a gift for high school or university admission.

■ Buyer's comment

The Mad Master GG-B100X is one of the G-SHOCK models that has a particularly strong feeling of being ``designed to be used over and over again.'' Not only is it equipped with quad sensors, but the balance between the texture of the carbon fiber structure and the lightness of less than 193 grams is exquisite, and the moment you hold it in your hand, you feel like it's the real thing. The khaki green coloring is sure to look great in outdoor scenes. We confidently recommend this watch to anyone looking for a watch they'll want to take out in the field.

— Nanapure Buyer Fujimuro

■ Purchase at each mall

■ Related model (G-SHOCK Mud Master)

• G-SHOCK See list

■ Consult on LINE