Does the addition of polyester and spandex affect the breathability and elasticity of this children's ribbed socks?

Polyester is a synthetic fiber with good abrasion resistance and wrinkle resistance, but its breathability is generally poor compared to natural fibers (such as cotton). Although the addition of polyester to this children's ribbed socks can enhance the durability and shape retention of the socks, it may reduce the breathability of the socks. Because the surface of polyester fibers is relatively smooth and it is not easy to absorb and release moisture, the feet may feel stuffy after wearing for a long time, and even increase the risk of damp feet and odor. However, this reduction in breathability is not absolute, and it also depends on factors such as the proportion of polyester in the socks, the thickness of the fibers, and the knitting method of the socks.
Spandex is a highly elastic fiber that is mainly used to increase the elasticity and comfort of the fabric. In terms of breathability, spandex has a relatively small impact. It does not have significant breathability by itself, so the addition of spandex does not significantly improve the breathability of the socks. The elastic properties of spandex allow the socks to fit the foot better, reducing the gap between the socks and the foot, thereby reducing the resistance to air circulation to a certain extent. However, this effect is not enough to significantly improve the breathability of the socks.
Polyester has a certain elasticity, but it is less elastic than spandex. Adding polyester to this children's ribbed socks can increase the elasticity of the socks to a certain extent, but this increase is not significant. The elasticity of polyester mainly comes from the elastic recovery ability of its fiber structure, but this ability in socks is affected by many factors, such as the thickness of the fiber, the weaving method, etc.
Spandex is a highly elastic fiber with a very high elastic recovery rate. It will not lose its original shape even after multiple stretches. Adding spandex to this children's ribbed socks can significantly improve the elasticity and comfort of the socks. The elastic properties of spandex allow the socks to fit the foot better and are not easy to slip off, while providing better support and comfort. This elastic property is particularly important for children, who usually need more fitting and comfortable socks to support their activities.