1. Polyester: Lightweight, durable, and waterproof. Commonly used in entry-level backpacks.
2. Nylon: Abrasion-resistant, waterproof, and durable. Commonly used in high-end backpacks.
3. Leather: High-quality, durable, and textured. Commonly used in fashion and business backpacks.
4. Canvas: Abrasion-resistant, breathable, and comfortable. Commonly used in casual and sports backpacks.
5. Polyurethane: Lightweight, durable, and waterproof. Commonly used as a lining material for backpacks.
