It depends on how often and how hard your dog wears. As a rule of thumb:

• Heavy use (e.g. running, hiking) – wash every 10 to 12 days of use
• Light use (e.g. dog walking, urban use) – wash every 20 to 30 days of use

Use your best judgment. If the suit looks dirty or is no longer beading water, it’s time to give it a wash. Either or rinse the dirt part and wipe up with cloth gently.