Rip Curl Men's 'Rifles Tide' Quartz Plastic and Polyurethane Sport Watch, Color:Blue (Model: A1119-NAV) Versatile polyurethane tide watch Individually water resistance tested for durability in a marine environment Quartz Movement Case Diameter: 41mm Water Resistant To 100m (330ft): In General, Suitable for Swimming and Snorkeling, but not Diving