Useful to carry out the drainage, filtration and the differentiation of the layers. It is also suitable to facilitate heavier loads.
| Weight (g/m2) | Width (m) | Length (m) | Area (m2) | Color | Usage |
| 100 | 1 | 10 | 10 | gray | delamination, drainage |
| 100 | 2 | 10 | 20 | gray | delamination, drainage |
| 100 | 1 | 15 | 15 | black | differentiations(peak loads) |
| 140 | 1 | 15 | 15 | black | delamination, drainage, filtration |
| 140 | 2 | 15 | 30 | black | delamination, drainage, filtration |