will you be a sound sleeper, or a mouth breather. a mouth breather! well, put on a breathe right strip and shut your mouth. allergy medicines open your nose over time, but add a breathe right strip and pow! it instantly opens your nose up to 38% more. so you can breathe and sleep. add breathe right to your allergy medicine. shut your mouth and sleep right. breathe right and look for the calming scent of breathe right lavender in the sleep aisle.