How does fabric thickness (gsm) affect bag strength?

The thickness of spunbond fabric, or GSM (Grams per Square Meter), directly indicates the strength and durability of the bag. The higher the GSM value, the thicker the fabric and the more weight it can support. Bags with low GSM are suitable for documents or light items, but not for heavy items or frequent reuse.

For promotional or giveaway items at general events, bags with a thickness of around 80–100 GSM are suitable because they can support moderate weights and are inexpensive. For applications requiring bags to hold heavy items, such as water bottles or multiple gifts, choose a fabric with a thickness of 120–150 GSM for stability and to reduce the risk of tearing.

In addition to GSM, considering the stitching and edge reinforcement of the bag is also important. Fabric thickness alone is not enough. If the seams are not strong or the edges are not well reinforced, even thick fabric can tear easily. Choosing a tear-resistant fabric and sewing with strong seams will ensure the bag lasts longer and provides user confidence.

Another thing to consider is color management and printing on the fabric. The thickness of the fabric affects the clarity of the pattern and the aesthetics of the logo. Therefore, choosing the right GSM (Same Weight) for the weight of the item and the printing job will result in spunbond fabric bags that are both strong and beautiful.