DAILIES can be worn every day, think "regular" underwear.
LINERS can be worn all day long for any unexpected leaks that may occur aka sweat or discharge.
PADS can be worn when on your period. & don't worry about leaking, they are super absorbent and can be worn for heavier and lighter flows, just #KnowYourFlow so you know when to put on a fresh pair.
NIGHT PADS can be worn to sleep in when on your period or during the day for those with a heavier flow.