This is the best deal we have ever offered on pond liners. Autumn/early spring is the best time to build a pond because outdoor working conditions are good and the pond gets a chance to establish itself before the spring growing season. We want to encourage as many new ponds to be built as possible and feel sure that this offer will put a pond build in the price range of all gardeners. The pond liner is tough and strong yet easy to lay and highly reliable. It is manufactured out of tear-proof LDPE.