This Vevor pond liner is made from LLDPE material and is designed to provide a durable, waterproof barrier for ponds, waterfalls, and other water features. Its 20 mil thickness helps resist tearing, punctures, and harsh weather conditions. The flexible construction allows it to bend and fold around irregular surfaces for easier installation. It is suitable for fish ponds, water gardens, artificial lakes, aquaculture farms, rooftops, and similar applications.