Introduction of commonly used backpack fabrics, the description of the fabric on the general backpack manual is not very detailed, only CORDURA or HD. What it says is just a textile method. If a more detailed description should be material + fiber + textile method. For example: N. 1000D CORDURA, that is to say, 1000D nylon CORDURA material.
Many people think that the "D" in the backpack material is representative of density or weight. This is all wrong. D is an abbreviation for denier. Denier is the unit of measurement for fibers. The calculation method is: 1 gram of weight per 9,000 meters long is called Denier. Therefore, the smaller the number in front of D, the thinner the line and the smaller the density. For example, 210D material, the texture is particularly thin, generally used as the lining of the bag or the compartment. The 900D or 1000D has a thick grain line and a thick line, which is very wear-resistant and is generally used as a bottom.
Let's talk about the materials. The raw materials used in the fabrics on the bags are Nylon and Poly. Occasionally, the two materials are mixed together. both of which are extracted from petroleum. Nylon is a bit better than Poly, and certainly more expensive. From the fabric, Nylon feels softer.