Product Description: 2 Pack 4x7 Feet Pond Liner, 20 Mil Small Pond Mat: Lightweight and flexible to fit any pond shape, recommended to lay the liner out in the sun for 10-15 minutes to easily shaped Easy to cut, bend and install, stretched around sweeping corners and gentle sloping sides Made of high-quality HDPE, sun-proof, UV resistant, waterproof and puncture resistant, durable outdoor ponds for a long time Black pond liner can well block soil and water, protect your fish pond from dirty and harmful substances Black HDPE Garden Pond Liner for Fish Ponds, Waterfall, Water Features, Fountains: Pond liner underlayment provides a flat surface for your water garden, fish/koi pond, fountain, backyard waterfall and other water features. Used in different ways: Utilize the liner for raised garden beds, sub-irrigation planters, and other self-watering projects. 2 pack 4x7feet pond liner, 20mil thickness, lightweight and flexible to fit any pond shape, safe for your fish and plants, or wildlife. Made of high-quality durable HDPE, the pond mat is sun-proof, UV resistant, waterproof and puncture resistant, used in outdoor ponds for a long time. Our small koi pond liner is easy to cut, bend and install, stretched around sweeping corners and gentle sloping sides. Recommended to lay the liner out in the sun for 10-15 minutes to easily shaped. Prevent Pollution: Black pond liner can well block soil and water, protect your fish pond from dirty and harmful substances, and you also can clean the pond easily. Pond liner underlayment provides a flat surface for your water garden, fish/koi pond, fountain, backyard waterfall and other water features.