What if I need to breathe through my mouth during the night?

You can always open your mouth and break the seal — mouth tape is not industrial-strength, and it's designed to be easily removable. Most tapes use gentle medical adhesive that creates light resistance, not a hard seal. Some brands (like Dream Recovery) even include a small breathing hole for airflow. Your body's natural instinct to breathe will override the tape if needed. That said, if you regularly can't breathe through your nose at night, address the underlying nasal congestion before trying mouth tape.