polyamide monofilaments fused together where they cross creating a humpy profile; tensile strength 1.9 KN/m², mass per unit area 400 g/m², non-toxic, chemically neutral, highly weather resistant, temperature resistant from -30 to +100 °C, normal flammability as per DIN 4102 B2 (German industrial norm)

PVC (vinyl) filament mat, both sides flat, weight per unit area is 3,300 g/m², weather resistant, UV resistant, flame resistance class: see text