General description This 42 m² pond liner underlay is designed to provide optimal protection for your pond liner. It acts as a barrier against damage from the ground, such as rocky substrates, 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 Polyester (PES) fibers Weight: 500 g/m² Thickness: 5.0 mm Roll width: 2 m Puncture resistance: 2600 N Color: Gray Manufactured in Germany Geotextile robustness class: 4 (GRK 4) Rot-resistant Metal and needle detected Diffusion open Other information The products from Aquagart are known for their exceptional quality, as they are made from high-quality materials in Germany.