Zorb® Original Fabric
Product Review (submitted on September 21, 2019):
I use this for menstrual pads. Thicker is a little better in this case because a thinner absorbent core paired with a PUL bottom layer and wicking top layer don't always have enough body to keep its shape and stay in place. But this zorb does. Though 2 layers does feel a bit bulky. For period underwear I do think even one layer of this is too thick and prefer the thinner newer gen zorbs.