What is "period underwear"?

Period underwear is a type of women's underwear designed to be worn during menstruation. It is made from absorbent and leak-proof materials, such as organic cotton, bamboo, or synthetic fibers, and comes in various styles, including briefs, bikinis, and boyshorts. Period underwear can be used alone or as a backup to other menstrual products, such as tampons or pads, and is washable and reusable. Some brands claim to offer protection for up to 12 hours, while others recommend changing them every few hours, depending on the wearer's flow. Period underwear is a sustainable and eco-friendly alternative to disposable menstrual products and can help reduce waste.