They are pocket diapers, so they can be stuffed with a prefold diaper so any other absorbant liner.
I used flannel fabric (from my mother in law) and a receiving blanket I bought for 5o cents at a thrift store...this is the perfect place to find receiving blankets to cut up for cloth wipes and diapers and burp cloths, etc, but I did think they were kind of pricey (in my opinion) so I only got a couple. I think it would be better found at yard sales.
Since I don't have the life size model just yet, my oldest son let me borrow his blue cow.
....and these do need a cover.
Cant wait to try them out for real! Next, I am going to make a cover with minky fabric and fleece..I dont know how well it will work, but the pattern says this would make a good cover and I have the stuff to try it out!