Medically proven. Developed by an ear, nose, and throat physician. Saline solution packets for use with nasal washing products. All-natural. Preservative free. Dissolves instantly. Pharmaceutical grade saline packets. Dry ingredients for SinuCleanse. Natural saline solution. All-natural pharmaceutical grade saline packets. Breathe better instantly. SinuCleanse products are an all-natural way to immediately relieve congestion and sinus symptoms without drug interactions or drug side effects. SinuCleanse products are medically proven, safe, gentle and effective. Recent studies show that regular use of the SinuCleanse System may reduce the duration and frequency of cold and flu symptoms.