Bulk bags are manufactured using woven polypropylene fabric, they are also known as FIBC bags, Big Bags, One Ton bags, Big Sacks, Super Sacks, etc.Safe weight limit: 4000lbsDuffle top bags feature a thin piece of fabric sewn onto the top seam of the bag and can be folded down around the outside of the bag to allow a full opening then once loaded it can be raised up and tied off to seal the product off.Spout bottom feature accommodates a 14x18" tube for unloadingStraps: 4 10" Green lift loopsCoated Fabric, Sift Proof SeamsDocument pouches: 2U PanelType A- non flammable products onlySafety rating: 5:1180 bags per pallet