Four filters, one mask
The image says that it is a 4 pack, however is is only one mask. It comes with 4 pm 2.5 filters, not mask. Overall it is designed well and would fit well on our 5 and 3yr old. Saw some other vendors selling masks that look the same and they all had good reviews. Expect this one to work well. Our kids seem excited to wear it which is half the battle.
Rating: 4 stars