Casio G-Shock Mudmaster GG-B100X-1A3ER Men's Watch • Bio-Based Resin Case • Digital Compass & Altimeter

The Casio G-Shock Mudmaster GG-B100X-1A3ER is a rugged outdoor watch from the "Master of G" collection, built for fearless adventurers, rangers and rescue personnel operating in the harshest conditions. The case and bezel are crafted from high-resistance bio-based resin with carbon fibre inserts, engineered to withstand both impacts and deformation. Thanks to the Carbon Core Guard construction and a dedicated mud filter, the watch offers outstanding dirt and dust resistance and is water-resistant to 20 bar.

The GG-B100X-1A3ER combines functionality with sustainability: the key case and strap components are made from eco-friendly bio-based resin derived from renewable organic resources. Equipped with a digital compass, altimeter, barometer, thermometer and step counter, the watch delivers all the essential data for outdoor use. Via Bluetooth, the time can be conveniently synchronised through the CASIO WATCHES app, which also offers features such as a mission log and location memory.

Key Features of the Casio GG-B100X-1A3ER

• Bio-Based Resin with Carbon Fibre: Case and strap made from eco-friendly, high-resistance bio-based resin with Carbon Core Guard construction for maximum shock resistance and dirt protection.
• Comprehensive Sensor Functions: Digital compass, altimeter (−700 to 10,000 m), barometer, thermometer and 3-axis step counter for demanding outdoor adventures.
• Bluetooth Smartphone Connectivity: Automatic time correction, mission log, location memory and additional features via the CASIO WATCHES app.

Care Instructions for Wristwatches

Care & Cleaning

• Daily: Wipe case and bracelet with a soft, dry cloth to remove dirt and perspiration.
• Water-resistant watches: Clean with mild soapy water and a soft brush, rinse, dry thoroughly.
  Important: Screw the crown down firmly beforehand!!!
• Not water-resistant: Clean only dry or slightly damp, do not use water or cleaning agents.
• Avoid: Harsh chemicals, perfume, cosmetics and heat.
• Leather straps: Do not soak, clean only slightly damp and allow to dry away from heat.
• Water resistance: Do not wear in the shower or bath, have it tested annually.
• Battery (quartz): Have a depleted battery replaced immediately.
• Mechanical watches: Service by a master watchmaker every 5 years.

Storage & Handling

• Store the watch separately, not in direct contact with other jewellery (risk of scratching).
• Place mechanical watches on a flat surface when winding, do not leave the crown pulled out.