Free bleeding is the practice of menstruating without using any internal or external menstrual products to collect menstrual blood. In essence, it's going through your period without tampons, pads, menstrual cups, or period underwear.
Some individuals who practice free bleeding choose to bleed directly onto towels, while others may opt to wear absorbent period panties or leggings to manage the flow. The key element is the absence of traditional menstrual hygiene products.
Essentially, it's "going with the flow" and managing your period through awareness of your body and developing strategies for dealing with the blood without using any external or internal collection or absorption devices.