Women who travel a lot know it’s never fun to change a pad or tampon in an airplane restroom. A train is probably even worse. Whether you’re off to an exciting family holiday or going to Tokyo for business, you would surely rather not be traveling during a difficult PMS or while on your period. For some women, it’s no big deal. But if you suffer from endometriosis or difficult periods, you definitely want to be prepared.

For women travelers, feminine hygiene products like tampons, pads and menstrual cups can be hard to obtain and complicate travel plans. Here’s what you should know about period poverty and access to menstrual products around the world.