The MIL-SPEC (short for Military Specification) is a must-have watch for military, first responders, the rugged outdoors, as well as true sports lovers who want a unique watch that they can rely on, whether on land, sea or in the air. The Luminox 3350 series is developed and built in compliance with the technical requirements for military standard set by the U.S. Department of Defense. The movement with HeavyDrive produces a counter-impulse when subjected to shock to prevent the hands from skipping, making it more tolerant to imbalances. The movement with PreciDrive, using a thermocompesation unit, the motor pulses according to changes in the ambient and water temperature. This watch Packaged as a set, the MIL-SPEC comes on a black rubber strap with CARBONOX signature buckle with an additional camo webbing strap and strap-changing tool.