What are period underwear? 1.Period underwear have many other names - period panties, menstrual underwear,leakproof brief,period briefs and reusable period pants 2.Another great benefit of period underwear is that they are reusable, meaning that after you have worn them for a day you can wash them to wear again! 3.Are you on track to spend over $10,000 on pads and tampons?Disposable pads and tampons are not only destroyingour planet, they are gobbling up our income too. Well,swapping them out for period panties instead is a sure-fireway to save a lot of money. 4.These ladies lace briefs can also be used in dayly wearing.perfect for workout, athletic,sports,traveling, yoga. odor resistance and moisture wicking performance technology, keeps you fresh and feeling dry throughout your day Size Chart: Low Waist Style unit: (inch) XS S M L XL Waist 26.5 28.1 29.6 31.2 32.8 Front length 11 11.7 12.3 12.9 13.5 Centr of back 6.4 6.8 7.2 7.6 8 Stay Comfortable: The water resistant lining of our period underwear uses 2 layers of regenerated cellulose fiber, makes itleakage proof ,and this fabric achieves moisture permeability, resistance to water . PANTIES WASHING TIPS:Hand wash and air dry are perfect to period proof underwear.Machine wash is allowed but is not recommended, because there is special material under the brief's water proof lining. Don't even put them on tumble dryer. That will be damaged. Please kindly refer to the size chart (picture 7) before buying it.