The VEVOR 15 x 15 ft pond liner is made from EPDM rubber and designed for outdoor ponds, water gardens, waterfalls, fishponds, koi ponds, and fountains. Its 45 mil thickness helps provide durable, leak-resistant performance in changing outdoor weather conditions. The liner can be cut to fit different pond shapes and sizes for flexible installation. It is suitable for creating pond ecosystems with plants, fish, ducks, and turtles. The black finish gives a clean, natural look for landscape pond applications.