Polypropylene sacks are considered to be the strongest packaging bags used, to pack materials such as seeds, fertilizers, metal parts and fixings, building, garden or document waste. These sacks are made by using a number of polypropylene threads woven in two directions to form a very light but strong bag. All our polypropylene woven sacks are not just flexible, strong and reusable but waterproof and U.V. protected against the sun. These bags can be recycled.