Test the extremes with the CITIZEN® PROMASTER Tough series. Living up to its name, this timepiece features a monocoque case (2 piece construction resulting in no caseback) providing extreme rigidity and shock resistance. Shown in a Ballistic CORDURA® & PU Combination, Strap, Buckle Other features include an anti-magnetic movement, anti-reflective sapphire crystal, and luminous hands and markers. Featuring our Eco-Drive technology – powered by light, any light. Never needs a battery.