Levianon, could you please provide documentation of your statement about hypoxia and CO2 retention dangers from masks. I have researched such claims before and have not found anything to suubstantiate such health risk other than theoretical risk to persons who suffer COPD, and even then likely inconsequential.
You may have become confused somewhere along the way, judging by the statement that you wear a mask to ward off contracting a virus. That is only true of N95 masks, which are not recommended for general use. The mask you describe as being composed of synthetic fibers or cotton cloth are to protect OTHERS from YOU and vice versa. The articles I posted early in this thread can provide you with a better understanding of the purpose, use and myths regarding face masks.