High-quality material and thickness: Made from durable HDPE (high-density polyethylene) with 0.12 mm thickness. Designed to withstand extreme weather and long-term outdoor exposure while being safe for fish and aquatic plants. Durable, weather-resistant performance: Heavy-duty construction resists tears, punctures, and degradation from sun and cold so your pond stays intact season after season. Flexible and easy to shape: Bendable, foldable membrane conforms to irregular contours and almost any pond shape. Easily trimmed to the exact size and shape you need. Simple, tool-free installation: Lightweight and manageable—lay the liner, shape it, and trim as required. No specialized tools needed for most installations. Flat bottom layer reduces soil buildup: The smooth underside creates a stable, flat surface that limits soil and sediment accumulation under the liner for a cleaner pond base. Protective barrier for water quality: Acts as an effective barrier to prevent harmful substances in the soil from leaching into pond water, helping maintain cleaner water for fish and plants. Top surface finish: Includes a rounded cobblestone-textured top layer that helps protect the liner surface and contributes to a natural-looking pond bed. Easy to clean and maintain: Smooth surfaces and protective layers make routine cleaning and maintenance straightforward so you can keep the pond healthy with minimal effort. Environmentally considerate: Manufactured to be safe for aquatic life and plants when used as intended. Practical applications: Backyard garden ponds and ornamental fish ponds: Create a reliable, fish-safe lining that preserves water quality and supports aquatic plants. Water features and fountains: Shape and install the liner to fit custom decorative features without complicated construction. Small agricultural or landscape retention areas: Use as a protective membrane where soil contaminants must be kept out of standing water. What this product delivers: Long-lasting pond protection and improved water quality Flexibility to match custom pond shapes and sizes Easy installation and straightforward maintenance Material: HDPE; Thickness: 0.12 mm; Function: waterproof pond liner, protective soil barrier, flexible membrane for custom-shaped ponds.