Not necessarily. While bag thickness can contribute to durability, it is only one factor in overall grain bag performance. Resin quality, UV protection, manufacturing consistency, and film construction all play important roles in determining a bag's strength and longevity. A well-manufactured grain bag made from high-quality materials can often outperform a thicker bag made with lower-quality materials. The best grain bag is one that provides the right balance of strength, flexibility, and durability for your storage needs. Interestingly, manufacturers can make grain bags that are thinner and stronger than the industry standard of 9mil but customer are resistant to going thinner which makes it difficult to market the change.
Key takeaway: Thickness matters, but quality matters more.