Yes, the DEWEL PRO Collar is waterproof. It is designed to be water-resistant, which means that it can withstand exposure to water without losing its effectiveness. This is an important feature for a flea and tick collar since your dog may get wet while swimming or bathing. However, it's important to note that the collar may become less effective if it is constantly exposed to water, so it's best to remove the collar before prolonged water exposure, such as during a bath or swim.