Wearing a helmet while you ride your bike can prevent injuries and lower the probability of head damage in accidents. Wearing a helmet is also required in most cities in Pierce County. You can check out WSDOT's web page for information on which jurisdictions require helmets.
Check out these additional tips for what to wear while biking to keep you safe:
Dress for the weather: Dress in layers or bring layers with you so you can adjust your needs based on the temperature. Bring a waterproof poncho if there’s any threat of rain.
Wear bright clothing: You’ll be more visible to other bicyclists and motorists on the road by dressing in bright, reflective clothing that can be spotted from far away.