Period panties are designed to collect blood and other menstrual fluids during your period. They work by having a special absorbent layer that traps the fluids, which is then hidden away from view in the underwear.There are many different types of period panties available, so it2019s important to do your research before you buy a pair. Some popular brands include Thinx, Modibodi and Knixwear.Most period panties come in a variety of sizes and colors, so you can find a pair that suits your style. They can also be quite pricey, but many women find them to be worth the investment.If you2019re looking for an environmentally friendly alternative to traditional disposable pads and tampons, then period panties may be the right option for you. They can also help you save money over time, as you won2019t have to rely on disposable pads and tampons anymore.