it's compressed face mask made from non woven fabric....you can dip it in any face serum either home made or commercial then it will expand into face mask...squeeze a little bit to remove extra liquid then put it into your face and let it to it's magic....
I use it with my home made fermented face serum.... it's really convenient to use.
it will expire in July but I believe it still can be used past it's expiry date at for a few more months....