C562 A map of a bounty

The filter is a mask that covers the nose and mouth. There is a water inlet and a water outlet, and the water enters the mask after passing through the oxygen.

There was a stopper at the inlet and outlet, which could only be used if the stopper was removed. However, the age limit was only six hours, which was twelve hours.

This was much weaker than Rong Hua's Water Repellent Pill