G-SHOCK GG-B100XM | February 2026

MUDMASTER with Quad Sensor and stainless steel bezel for enhanced durability and refined finish

Designed for use in harsh environments, the MUDMASTER GG-B100XM combines a shock-, dust-, and mud-resistant structure with a stainless steel bezel that offers excellent durability, scratch resistance, and refined brilliance. The result is solid functionality and strength worthy of the name “survival gear.” Equipped with a Quad Sensor and Smartphone Link functions, the watch provides multi-dimensional support for a wide range of field activities. With materials, construction, and functions working in harmony, the watch stands as a reliable companion for extreme conditions.

Lineup

A table comparing the facets of 2 products
Facet	GGB100XM-1A View details	GGB100XMB-1A View details
Price
Price	Regular price $829.00	Regular price $829.00
Band
Band	Bio-based resin band	Bio-based resin band
Case and bezel material
Case and bezel material	Bio-based Carbon / Stainless steel	Bio-based Carbon / Stainless steel
Case size (L× W× H)
Case size (L× W× H)	55.4 × 51.3 × 19.4 mm	55.4 × 51.3 × 19.4 mm
Water resistance
Water resistance	200-metre water resistance	200-metre water resistance
Weight
Weight	104 g	104 g
Glass
Glass	Mineral Glass, Spherical Glass	Mineral Glass, Spherical Glass
Surface treatment
Surface treatment	-	Black ion plated bezel
Compatible band size
Compatible band size	145～215mm	145 to 215mm

Stainless steel bezel: Refined craftsmanship highlighting the aesthetics of practical elegance

As a defining element of the toughness-oriented design, the bezel conveys a strong presence. Made with stainless steel, its complex form of multiple surfaces and contours is shaped through forging. The top surface, beveled edges, and sides are each finished with different polishing techniques.

The GG-B100XM employs a silver-coloured bezel with a honed matte finish that enhances resistance to mud and dust while reducing light reflection, giving it a calm, subdued texture. The GG-B100XMB features a black ion-plated bezel with mirror polishing, combining high scratch resistance with a refined metallic sheen.

Shock-, dust-, and mud-resistant structure delivered by carbon fibre-reinforced resin

Offering high strength and excellent weather resistance, the carbon fiber-reinforced resin case protects the module. Gaskets are applied around the buttons to ensure a tight seal, providing reliable dust and mud resistance even in harsh environments. Carbon fibre-reinforced resin is also used for the cover enclosing the case back and for the movable parts on the underside of the band, enhancing both durability and wearing comfort.

* Image shows the GG-B100XM-1A.

Quad Sensor supporting land missions

In addition to the triple sensor that measures compass bearing, altitude/barometric pressure, and temperature, the watch is equipped with an accelerometer for step counting. By collecting diverse data, the Quad Sensor makes it easy to monitor environmental changes and track activity history, helping ensure reliable performance in land missions under the toughest conditions.

* Image shows the GG-B100XM-1A.

Bio-based resin

Key resin components used in the case, band and case back are made with bio-based resin.

* Image is included for illustrative purposes.

Smartphone Link

The watch connects to a smartphone via Bluetooth® to automatically adjust the time. Using the dedicated app, various watch settings and mission logs can be managed with ease.