quality HDPE liner: Heavy duty pond liner made from durable HDPE. 0.12 mm (5 mil) thickness provides longterm outdoor performance, withstands extreme weather, and protects water quality for fish and plants. Flexible design: Garden pool membrane is flexible and easy to bend or fold to fit almost any pond shape. It can be cut to the exact size and shape required for a specific pond. Easy to install: The bottom layer creates a flat surface that reduces soil buildup in the pond area. Tool installation is simple, and a layer of round cobblestones on provides a finished look and added stability. Protective barrier: The liner prevents harmful soil substances from seeping into the pond, helping to keep water clean. It supports a healthy natural environment for wildlife and aquatic plants, and is easy to clean. Specifications and performance: 0.12 mm / 5 mil thickness, HDPE material, suitable for outdoor use and longterm pond applications. Designed to endure outdoor conditions while protecting the pond ecosystem. Practical use scenarios: 1. Backyard decorative pond or koi pond: Create a durable, adaptable liner that fits irregular garden contours and maintains water quality. 2. Garden water feature or fountain: Flexible membrane that can be shaped to form the base for water features while keeping soil contaminants out. 3. Wildlifefriendly pond: Lining that supports plants and small wildlife by maintaining a clean, stable aquatic environment and easy maintenance.