For 25 years Casio G-Shock digital watches are the ultimate tough watch. Providing durable, waterproof mens digital watches for every activity. G-Shock is the ultimate tough watch. It was born from a developer"s dream of "creating a watch that never breaks." Guided by a "Triple 10" development concept, the design teams sought a watch with 10-meter free-fall endurance, 10-bar water resistance and a 10-year battery life.