These reversible Kamen Rider OOO face masks have patterns on both sides and a filter in between. You'll get 2 masks in one pack. And shipping is free within the USA!
Using these masks is easy. Just put one on like you would with any regular mask, making sure it covers your nose and mouth. Remember to wash your hands before and after using the masks. As for maintenance, you can gently hand - wash them with mild soap and let them air dry. Don't use bleach or harsh chemicals as they might damage the patterns and the filter. Also, if the filter seems to be losing its effectiveness or the masks get too dirty, it's time to replace them.
