The instructions that come with your men's Invicta watch will detail how water resistant it is. It’s important to make certain the crown (winding knob) isn’t pulled out while your watch is wet, and never place the watch under running water. Also, over time, the watch's resistance to water will diminish, so greater care must be exercised when wearing an older watch in or near water. Because of this, it’s a good idea to have the water-resistance of your watch periodically checked.