Backpack fabric choice balances durability, weight, water resistance and cost. Nylon is strong and often water-resistant, making it a common choice for technical and commuter packs. Polyester offers a good balance of durability and affordability with a wide range of finishes.
Canvas provides a natural, structured look that suits casual and lifestyle bags, though it is heavier and less water-resistant than synthetic options. Consider a water-repellent coating for outdoor and commuter lines.
When sourcing, ask your manufacturer about denier, coating and stitching strength. These details affect how the pack performs in daily use and how it is perceived by end customers.