Non woven PP sacks are made from polypropylene fibers. They are heated in air to make long and fluffy threads that are pressed together to create a fabric with a weave-like structure. These bags can last for a year, can be easily customized with different colors and graphics. They are generally available as tote bags and are used by departmental stores. More heavy sacks for shipping and transportation for food, fertilizers or building materials are also available.