Most of the watches here are water resistant for sweat and rain purposes. None of them are completely waterproof. A few claim that they can still work even in several meters of water, but that would be an individualized feature. The water-resistant one will work in the shower and when you are caught in a rain shower. Swimming and bathing will not be permitted by most of these devices, as submerging them in water is not the best mode of care. It is best to remove them before these activities are performed, so the watch remains in the best condition and functioning as it should.