When choosing the material of a shoulder bag, you can consider the following common materials and their characteristics:

‌Nylon‌: Nylon is a lightweight and wear-resistant material with good water resistance and elasticity. It is usually used to make lightweight and fashionable backpacks, suitable for business and leisure occasions.

‌Polyester‌: Polyester fabric is strong and durable, has good stretchability and does not deform, but is relatively heavy, has poor moisture absorption, and is prone to static electricity. It is suitable for making casual style backpacks.

‌Canvas‌: Canvas material is strong and durable and affordable. It is suitable for making casual style backpacks, but it is easy to pilling and fade, and needs to be replaced frequently to match clothing.

‌Genuine leather‌ (natural leather): Backpacks made of genuine leather are high-grade, breathable, and skin-friendly, but require regular maintenance and are more expensive. They are suitable for users who pursue high quality.

When choosing the material of a shoulder bag, in addition to considering the characteristics of the material itself, you should also pay attention to the following points:

Structural design: A high-quality casual messenger bag should have wider, thicker and freely adjustable shoulder straps, belts and back pads, and the back pad should preferably have perspiration ventilation grooves.

Fabric material: The fabric should have wear-resistant, tear-resistant, and waterproof properties. Common ones include Oxford nylon cloth, polyester staple canvas, cowhide and genuine leather.

Workmanship: The quality of the stitching process should ensure the necessary firmness, and the stitches should not be too large or too loose.
In summary, when choosing the material of a shoulder bag, you should consider it comprehensively based on personal needs and usage scenarios. For example, nylon is suitable for users who pursue lightness and fashion, while genuine leather is suitable for users who pursue high quality and comfort. At the same time, paying attention to the structural design, fabric material and workmanship of the shoulder bag are also factors that cannot be ignored when choosing.