Modern manufacturers of mass-market goods often save on materials and means of production. The creators of branded clothing value their reputation, and therefore choose more expensive fabrics for their products, beautiful in appearance and pleasant to the touch. These materials can be delicate, require special care, and therefore not very durable.
For example, in the fabric of expensive jeans, you can often see a small percentage of spandex. This synthetic material gives the product elasticity and special softness. Manufacturers of cheap goods, as a rule, add polyester. It is no less elastic, but more affordable. And let the polyester is more rigid, but pellets do not form on it. Whereas on the surface of spandex, after just a few washes, numerous hooks can appear, leading to rapid wear of the product.
Also, in mass production, inexpensive synthetic fabrics are more often used, which, although outwardly, although they are not inferior to natural ones, are much inferior to them in terms of physical properties. For example, wool is mainly replaced with acrylic. The body in such clothes does not breathe, and the person will constantly sweat.