Drug free Breathe Right nasal strips are clinically proven to instantly open your nasal passages so you can breathe easier. Breathe Right nasal strips are flexible spring-like bands to gently lift and open nasal passages to allow better airflow. Breathe Right strips can be used day or night for relief from stuffiness due to allergies and colds. The size you choose is important; use the right size for best results. Drug free, Instantly open your nasal passages, Can be used day or night, Fits 75% of adult noses for S/M strips. Larger size strips available for adults with larger nose, 9/10 people said that they could breathe better instantly, Opens your nasal passages so you can get a more restful night's sleep.