Cotton briefs

Natural fiber is a collective term for natural fibers from plants or animals.
The most common ones you will find in underwear are: Cotton, Modal/Viscose (natural plant-based cellulose), Wool and Silk.
Natural fibers have very good breathability and are therefore particularly suitable for panties. A common denominator for almost all panties is that they have a 100% cotton gusset in the crotch that absorbs moisture and ensures the best possible conditions down there.