Question: how often do you have to change period underwear?
Answer: For most tweens and teens, our 4 tampon absorbency undies can last between 8 - 12 hours. But every period is different — depending on their flow (light, moderate, heavy), they may have to change their Thinx (BTWN) more often. Pro tip: if they've got a long day ahead, pack extra pairs just in case!