Rip Curl Men's 'Civilian Automatic Steel Leather-Navy Stainless Watch, Color:Brown (Model: A2659-NAV) 24 jewels: automatic movement (no battery required) 316L high grade stainless steel case that does not rust and is non-corrosive when exposed to a marine environment Individually depth tested and water resistant up to 100 meters (330 feet) Durable mineral crystal that is scratch resistant and protects from all types of impact Water resistant to 330 feet (100 M): suitable for snorkeling, as well as swimming, but not diving