Material and durability: This pond liner is made of durable 8 mil (0.12 mm) HDPE with tensile and impact strength that resists tears and punctures. Flexible and : The liner is flexible, easily bending and folding to fit almost any pond shape, so you can cut it into the exact shape you need for your pond. Waterproof and leak resistant: Thick HDPE liner provides reliable waterproofing and anti leakage performance for long term use. Easy to clean and protects water quality: The koi pond liner provides a flat surface that reduces soil accumulation and helps prevent harmful substances in the soil from penetrating into the pond, aiding easier maintenance and cleaner water. Practical compatibility and performance: Designed for koi ponds and other garden ponds, offering a durable, long lasting liner that maintains water integrity while accommodating irregular layouts. Use scenarios Build a custom shaped backyard koi pond or garden pond by cutting the liner to fit your irregular space and securing the edges for a watertight installation. or an existing pond liner in an irregular or leaky pond to restore water retention and prevent leaks. Create a low maintenance water feature with a flat base that minimizes soil intrusion and simplifies cleaning and water quality maintenance.