You can still go to the pool or the beach when you're on your period. The Always line of discrete Ultra Thins is so thin that you can wear them with confidence inside your swimsuit. You'll definitely want to go for a non-wing pad. So go ahead: Wear full makeup, spend an hour on your locks, get your sunscreen on and soak up the sun. If you plan to jump in the water, though, wearing a tampon instead of a pad is a must. You cannot swim when you are menstruating unless you use a tampon; otherwise, you risk menstrual fluid in the pool.