Many fabric face masks have two layers of woven fabric, and a pocket. The pocket allows you to put in another layer (or more), to suit your needs.
DHHS and WHO guidelines recommend using a water-resistant layer on the outer or middle layer. Here's a quick guide to creating a DIY water-resistant inner layer.
Your pocket may allow for more than one layer, in which case an absorbent layer (tissue, paper towel etc.) can also be added. If you wear glasses, an absorbent layer will help reduce fogging. The absorbent layer should be closest to your face and the water-resistant layer should be towards the outside of your mask.