Sewn Open Mouth (SOM) Paper Bags
Built for Speed, Strength, and High-Volume Filling
Sewn open mouth bags, often called SOM bags, are one of the most widely used multiwall paper bag styles in industrial packaging. The design is simple and effective: the bottom of the bag is sewn closed during manufacturing, leaving the top open for filling. Once product is loaded, the top is closed with stitching, tape, or a combination of both, depending on the application.
That open top is what makes SOM bags so practical. They fill fast, they handle a wide range of product densities, and they hold up to the weight and handling that comes with high-volume packaging lines. Bag Supply Company manufactures sewn open mouth bags using multiwall kraft construction, giving customers a bag that is strong enough for tough environments but still cost-effective at scale.
Why Choose Sewn Open Mouth Bags
Fast, reliable filling. The open top design is built for speed on automated and semi-automated filling lines, which matters when you’re moving product in high volume.
Strength where it counts. Multiple plies of kraft paper give SOM bags the tear resistance and load-bearing strength needed for heavier or denser products.
Flexible closure options. Bags can be closed by sewing, taping, or both, depending on how the product needs to be protected and how it will be handled downstream.
Custom printing that holds up. Our printing capability means your branding, handling instructions, and regulatory information print clean and stay legible through the supply chain.
Eco-friendly by nature. Kraft paper is a renewable, recyclable material, which makes SOM bags a strong option for companies looking to reduce packaging’s environmental footprint without sacrificing performance.
Common Applications for SOM Bags
Sewn open mouth bags are a go-to choice across a range of industries, including:
- Animal feed producers who need a bag that can handle rough handling from mill to farm
- Agricultural products like seed, fertilizer, and other granular or particulate goods
- Construction materials such as sand, cement additives, and other dry building products
- Chemical and industrial powders that require multiwall protection against moisture and tearing
- Food-grade dry goods, when produced with appropriate liners and food-safe handling
If your product is dry, granular, or powdered, and you’re filling at volume, an SOM bag is likely the right starting point.
Frequently Asked Questions
What does “open mouth” mean on a multiwall paper bag? It refers to the top of the bag being open until the product is loaded. The bottom is sewn shut during manufacturing, and the top is closed after filling.
How are sewn open mouth bags closed after filling? Most commonly with sewing, tape, or a combination of both. The right method depends on the product, the filling equipment, and how the bag will be handled and shipped.
Are SOM bags recyclable? Yes. Multiwall kraft paper bags are made from a renewable material and are recyclable, making them a strong choice for companies focused on sustainable packaging.
Can Bag Supply Company print custom graphics on SOM bags? Yes. We offer high-quality custom printing so your branding, product information, and compliance details all come through clearly.
Let's Talk About Your Sewn Open Mouth Bag Needs
Call Bag Supply Company Today so we can go to work for you.
Every product and filling line is a little different. Our team can help you figure out the right ply count, paper weight, and closure method for your specific application.
Call Bag Supply Company today so we can go to work for you.