Two Abe masks. One mask has 5 filters inside. Filter set (unopened) x 2 (40 filters) Filter set (opened) x 26 filters The Abe mask was heavily criticized at the time. It was perfect for my son. Made of cotton, you could just change the filter, and wash and reuse it... My son doesn't have atopic dermatitis, but his skin gets irritated easily, so he couldn't wear regular masks. Just cotton alone was a concern... With the filters, I felt safe using them. I've been storing them, but I'd like to give them to someone looking for cotton masks. I have a lot of filters, so I think they can be used quite a bit.