Period pants are a type of underwear designed to be worn during menstruation. They work by using multiple layers of absorbent and waterproof materials to capture and contain menstrual fluid, preventing leaks and stains on clothing. The innermost layer of the period pants is made of absorbent fabric, which draws in and holds the menstrual fluid. The middle layer is usually made of waterproof material, such as PUL (polyurethane laminate), which prevents the fluid from leaking through to the outer layer. The outer layer is typically made of a moisture-wicking fabric that keeps the wearer dry and comfortable. Period pants are reusable and can be washed and reused, making them a sustainable and eco-friendly alternative to traditional period products. They are available in a variety of styles and absorbencies, so women can choose the best option for their needs.