DexCom's continuous glucose monitoring system is designed to be water-resistant, so you can indeed swim or shower while wearing it. However, the degree of water resistance may depend on the specific model of the DexCom device. Generally, DexCom devices can withstand exposure to fresh and salt water for short periods of time, which makes swimming and showering permissible activities. It is important to note that while the sensor can handle water exposure, it is recommended not to intentionally subject it to prolonged immersion under water, such as in hot tubs or saunas. After swimming or showering, you should ensure that the insertion site is clean and dry to maintain proper adhesion and functionality. For precise information regarding water resistance and care specific to your model, you may want to refer to the user manual available on the DexCom website.