CASIO G-SHOCK GDG-B100-1A3DR MUDMAN MASTER OF G GREEN MEN WATCH

The G-SHOCK GDG-B100-1A3DR is a MUDMAN, part of the MASTER OF G — LAND line built for ground that fights back. Mud-resistant construction seals the case against grit and dust, Carbon Core Guard construction forms the core, and a bumper-guard design interlocks the case and bezel with the band so the whole watch works as one piece rather than a case bolted to a strap. The case back is engraved with the MUDMAN mole character racing across harsh terrain.

It is a working instrument rather than a dress watch. A MIP LCD keeps the display readable, an accelerometer counts daily steps and monthly running distance, and the training functions record distance, speed, pace, calories and laps for up to 100 runs with 140 lap times each. Bluetooth links it to the CASIO WATCHES app to set the time automatically, correct run distance against your phone's GPS, and pass through call, email, calendar and reminder notifications — which the watch can signal by vibration rather than sound.

Despite a 63.6 × 49.6 × 16.2mm case, bio-based carbon and bio-based resin keep it to 66 grams. Power comes from a CR2032 battery lasting approximately two years, and the watch is rated to 200 metres of water resistance.

At a Glance

• BrandCasio G-SHOCK
• SeriesMUDMAN / Master of G — Land
• ModelGDG-B100-1A3DR
• Module3587
• Case Size63.6 × 49.6 × 16.2 mm
• Weight66g
• ColourGreen/Black
• DisplayMIP LCD, Digital
• ConstructionMud Resistant, Carbon Core Guard
• ConnectivityBluetooth, CASIO WATCHES App
• Water Resistance200m (20 BAR)
• Battery LifeApprox. 2 Years (CR2032)

Why You'll Love It

• Mud resistance is the point of a MUDMAN. The sealed construction keeps grit and dust out of the case and buttons, which is the failure mode that ends most watches used on building sites, trails and farmland.
• 66 grams for a 63.6mm case is remarkably light. Bio-based carbon and bio-based resin do the work, so the size reads as presence rather than weight on the wrist.
• Bluetooth means you never set the time. The watch syncs to your phone automatically through the CASIO WATCHES app, including world time updates when connected.
• The training functions go well beyond a step count — distance, speed, pace, calories, auto and manual laps, auto pause and target alerts, with history for 100 runs and 140 laps each, and run distance correctable against your phone's GPS.
• Vibration alerts let it work silently. Elapsed time, calorie targets and phone notifications can all reach you through the wrist instead of a beep, which matters in meetings and on quiet sites.
• Four daily alarms, a 38-zone world time, an interval timer with up to five settings and auto-repeat, and a 99:59'59" stopwatch cover the practical side without needing the phone.

Perfect For

• Outdoor & Trail Use
• Running & Training
• Worksite & Field Work
• Hiking & Camping
• Travel Across Time Zones
• Swimming & Water Sports
• G-SHOCK Collectors
• Gift for Him

Key Features

• Mud-resistant structure — Casio's sealed construction for use in harsh, dirty conditions, keeping mud, grit and dust out of the case and buttons.
• Carbon Core Guard construction with bio-based carbon — Casio's named core structure, with the case and bezel formed from bio-based carbon and bio-based resin.
• Bumper-guard design — the case and bezel interlock with the band, and the case back is engraved with the MUDMAN mole character.
• Mobile link over Bluetooth — automatic connection to the CASIO WATCHES app for auto time adjustment, watch setup, world time updates, phone finder, activity history and life log.
• Accelerometer step and training functions — daily step count and monthly running distance, plus distance, speed, pace, calories, auto and manual laps, auto pause, time or calorie target alerts and a customisable training display. Stores 100 runs with up to 140 lap times each, and distance can be corrected using your phone's GPS.
• Vibration alerts — training and smartphone notifications can be signalled by vibration, which can be switched on or off.
• Timekeeping suite — 38 time zones (38 cities plus UTC) with automatic summer time, four daily alarms with snooze and an hourly time signal, a 1-second stopwatch to 99:59'59" with split timing, and a countdown timer with a five-setting interval timer and auto-repeat up to 20 times.
• Auto LED backlight — red LED with afterglow and a selectable 1.5 or 3-second duration, over a MIP LCD display.
• Shock-resistant construction with 200-metre water resistance (20 BAR) — rated for swimming, snorkelling and recreational water sports. Not rated for saturation diving.
• Practical settings — 12/24-hour format, flight mode, button tone mute, user profile, full auto-calendar to 2099 and a power-saving function.

Technical Specifications

The Casio G-SHOCK GDG-B100-1A3DR is a digital MUDMAN on module 3587 from the Master of G — Land line, built with a bio-based carbon and bio-based resin case to Carbon Core Guard construction with mud-resistant and shock-resistant structures. The case measures 63.6 × 49.6 × 16.2mm and weighs 66 grams, with mineral glass, a MIP LCD display, a red auto LED backlight and a bio-based resin band fitting 145mm to 215mm, rated to 200 metres of water resistance. An accelerometer drives step counting and training functions storing 100 runs, and Bluetooth links the watch to the CASIO WATCHES app for automatic time adjustment, world time updates, notifications and GPS distance correction. Timekeeping covers 38 time zones, four daily alarms, a 99:59'59" stopwatch and an interval timer. Accuracy is ±15 seconds per month without the mobile link, and battery life is approximately two years on a CR2032.

Best Matched With

• Technical Shell
• Black Tee
• Cargo Trousers
• Fleece Mid-Layer
• Work Jacket
• Trail Shoes
• Black Cap

Frequently Asked Questions

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