General description This 54 m² pond liner underlay is designed to provide optimal protection for your pond liner. It safeguards against damage from rocky soil, burrowing animals, and root growth from trees and shrubs. For enhanced durability, it is recommended to use the fleece both beneath and above the pond liner to prevent potential damage caused by swimming activities or high water pressure on sharp stones. Technical specifications Material: Polypropylene (PP) and PES synthetic fibers Weight: 500 g/m² Thickness: 5.0 mm Roll width: 2 m Puncture resistance: 2600 N Color: Grey Manufactured in Germany Geotextile robustness class: 4 (GRK 4) Rot-resistant and detector-tested Diffusion-permeable Other information The products from Aquagart are known for their exceptional quality, as they are made from high-quality materials in Germany.