G-Shock GGB100X-1A9 Master of G Mudmaster Quad Sensor Heavy Duty Carbon Orange Luminox 8817 Wrist-based heart rate might be

Wrist-based heart rate might be an easy choice when you want to move without restrictions on race day

the yellow dial

Movement: Eco-Drive E031

The large rotary bezel allows easy operation outdoors

this distinctive timepiece includes a date calendar

G-Shock GGB100X-1A9 Master of G Mudmaster Quad Sensor Heavy Duty Carbon Orange Luminox 8817 Wrist-based heart rate might beFor the fearless adventurer and nature lover, a tough and rugged Master of G MUDMASTER featuring bezel and case constructed of heavy duty carbon and environmentally responsible materials. The watches of the G SHOCK Master of G line, developed for professionals working in the harshest environments, come equipped with even tougher functionality. And the MUDMASTER takes this another step further with the ability to handle the roughest rubble and debris