Casio G-Shock MUDMASTER GSG100-1A All Black Solar Outdoors Military Mens WatchA model fitted with the dust proof, mud proof structure from the Master of G MUDMASTER series, which is intended for extreme on land use in terrains strewn with rocks, sand, and debris. In order to support use in harsh environments, the buttons have a cylindrical button guard structure that makes them dust and mud proof. Cylindrical pipes protect the buttons, and gaskets inside the buttons keep out fine sand and mud. Additionally, the cylinder pipes