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: 4000lbs Duffle 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 with pajama closure and B-lock Spout bottom feature accommodates a 14x18" tube for unloading Straps: 4 10" Green Corner straps Document pouches: 2 U Panel Type A- non flammable products only Safety rating: 5:1 155 bags per pallet