Quilted photo albums

[kittybrat.livejournal.com]

Does anyone know where I can find information online about quilting a photo album?  I have this one pattern that has one of the three supplies as "quilted material", but I have no idea what it's talking about.  I tried googling that and I now know where to buy supplies, but I still don't know how to come by "quilted material".

Any help is appreciated.