FLEX disc should not be worn for more than 12 hours. After 12 hours, you must remove the disc, dispose of it, and only insert a new one.
FLEX disc is FDA registered product and it is an FDA regulation that no menstrual product should be worn for more than 12 hours. We urge you to only use FLEX disc as directed.
We know that FLEX disc can be so comfortable, you may forget about it, so we highly recommend setting a reminder or alarm on your phone so you don't forget to change it when the time comes!