Most watches are water-resistant. NO WATCH is truly waterproof. A water-resistant watch has gaskets which together with the crown and crystal help seal the case against average water pressure at a stated pressure or depth. A watch that is water resistant to 3ATM, for example, is built to withstand the average pressure (3 atmospheres) occurring at 99 feet or 30 meters below the ocean's surface.
All watches are tested to meet international standards for water resistance. However, unless the watch is labeled as a diver's watch, we do not recommend swimming with it.
Watch seals are generally designed to withstand only casual contact with water, such as splashes of water and rain.
We also do not recommend you shower, enter steam rooms, or bathe while wearing your watch. Many agents, including steam, soap, mildew, salt water, perfume and chlorine can get into the watch, and if not cleaned immediately, the gaskets and seals can break down over time, allowing dust or moisture to penetrate the case and potentially damage the moving components of your watch.
Finally, you should never pull out the crown or operate any chronograph or special function pushers/buttons on your watch when it is wet or under water.