The Differences Between an Open Top, Duffle Top and Spout Top FIBC

As we know, FIBC is a large woven plastic bag with a top and bottom. The bulk bags are moved by using 4 loops (or 1 loop, 2 loops, 5 loops) attached the corners of the bag. In general, these bags are designed to safely transport and store 2,000 - 4,000lbs (1000-2000kg) of cargoes. Most of EPP’s valued customers have some concerns about the big bag’s top options. The following information will give new or inexperienced bulk bags’s users a basic understanding of 3 common top style.

Open Top Bulk Bags

Open Top or “Full” Open Top means that the bulk bags is completely open with no ability to be closed. The product inside the bag will be exposed to the outside enviroment. Open top FIBCs are generally more economical than Spout Top or Duffle Top bulk bags. An open top jumbo bags is not any less strong than bulk bags with a top closure.

These types of FIBCs don’t tend to go well with most factories’ equipment designed to fill and load big bags. Moreover, they offer little protection against dust or spillage when filling or discharging the bag.

Applications of open top 1 ton jumbo bags:

  • Soil
  • Sand
  • Rock
  • Landscaping Material
  • Construction Debris

Duffle Top jumbo bags

Duffle top bulk bags or FIBCs with skirt cover have a thin lightweight top panel that is the same width and depth as the four sides of the bag. The larger opening provides more flexibility in filling options and the types of machinery it can be used with. Unlike an open bag, after filling the duffle top can be closed to protect your goods and allow for easier transportation without spilling any of your products.

Duffle (Filling skirt) size is varies based on the size of the bag’s base. A wider bag requires a tall enough skirt to properly tie off after filling. Duffles can be custom designed to meet the requirements of the customer. Duffle Top bulk bags are generally more expensive than open top and spout top bulk bags.

Applications of big bags with filling skirt:

  • Aggregates
  • Animal Feed
  • Granular Material
  • Chemicals
  • Beans & Seeds

Spout Top Jumbo bags

A spout top bulk bag looks a little different from the duffle top. Spout top FIBC bags or Tubular bag with filling spout have a sturdy spout sewn to the top panel of the FIBC. This spout is cylindrical and not as wide or deep as the rest of the bag. The smaller opening of the spout means fewer dust issues and less product spillage during filling and discharging. After filling, the spout can be tied off to keep the product in with pre-attached ties.

The top panel and spout are made from coated woven polypropylene. The most common spout size is 14” Diameter x 18” Length. However, FIBC’s spouts can be custom designed to meet the requirements of our customer. Spout tops are generally more expensive than open tops but less expensive than duffle tops.

Applications of spout top super sacks:

  • Food Ingredients
  • Fine Chemicals
  • Cement
  • Resin
  • Silica

What Type of Bulk Bag Should You Choose?

The largest factor when considering what top construction is how you’re going to fill the bag. If you only use one or two machines to fill and discharge your bag and those machines are calibrated for spout top bags, the spout bag will be the better option due to its dust-reducing and spill-protection properties.

However, if your business requires you to fill or discharge bags from multiple machines, the spout bag may not fit them all. Therefore, for ease and consistency, you may be better off using the duffle top bag, so you can be sure your product can be filled or discharged with all of your equipment. The duffle top will allow a larger range of machines to fill the bag thus giving your bag greater versatility.

For more information on bulk bag types and their components visit our website or speak to one of our sales professionals by emailing


Food grade Big Bag for coffee beans