Fit Your Pond Size: This 15 ft x 20 ft pond liner for outdoor ponds is made from premium PE with a 14 Mil thickness, ideal for backyard ponds, landscape ponds, and eco ponds. The pond liner can be trimmed to fit your specific pond size as needed 3-Layer Leak-Proof Design: This pond liner features dual PE layers with a flexible HDPE middle layer, allowing it to conform well to various pond shapes. It supports long-term use, avoids water leaks, and reduces frequent refilling and liner replacement Tear-Resistant & Wear-Resistant: Made from 14-mil high-strength PE woven fabric, this pond liner is hard to puncture or tear. The reinforced edging helps slow surface wear, making it a dependable choice for demanding outdoor pond environments Installation Made Easy: This pond liner includes four metal buttonholes at corners, allowing you to secure it with ground stakes or rope. Simply dig the pond, clear away debris, cut the liner to size, and lay it in place. NOTE: Ground stakes not included Ideal for Pond Ecosystems: This fish pond liner works well for ponds with plants, koi, fish, ducks, and turtles, creating a lively small ecosystem. It can also be used for other purposes, such as weed barriers or planter liners for flexible outdoor use