BAFFLES

 

close up of 4 layers

4 layer stack
Stack of 4 single layers on top of each other

There are a few baffle systems in the industry, the most common use the Dacron fiber sheets.
Stacked with floation sheets and joined by combinations of glueing, ties and sewing.

These are then inserted into a bag and the final seal completed to make the mattress. Layers of baffles come in various weights/thicknesses so one manufacturer would not neccessarly be the same as another manufacturer.
This is not a problem when you compare the totals of the combination. See TEP