Because pure cotton towels are more environmentally friendly and have better quality. I searched for some information when I wrote my thesis before. Detergents that are not made of cotton are generally made of chemical fibers. There will be a lot of chemical additives in the production process and chemical residues in the finished products, which will do harm to the environment and hurt the skin. This kind of towel is rough to the touch, easy to break and of poor quality. The raw material of pure cotton face towel is cotton, which is an environmentally friendly fiber. No chemical substances will be added in the production process, and it can be degraded after being buried in the soil, which will not cause too much pollution and is very friendly to the environment. Moreover, the cotton towel feels soft and delicate, and it won't break when wet, and it won't easily fall off, and it won't irritate the skin. The standard of this kind of towel is quite strict. Everyone should pay attention to distinguish when buying. Like me, I usually use cotton soft towels made by cotton manufacturers. Their soft cotton towel is 100% cotton, which is not only environmentally friendly, but also of good quality.