It depends on the brand and the headphone model. Not all of them are protected against water completely. The level of the water-resistance also depends on the IPX rating that they have. While a headphone specifically for work or Zoom meetings doesn’t need to be water protected as chances of water exposure to these headphones are low. But, if you want versatile audio gear that can be used for different applications including outdoors, then you must consider the waterproofing capabilities.