Trust the #1 Physician Recommended Brand* Large Volume & Low Pressure™ System for Saline Nasal Irrigation, Moisturization & Nasal Hygiene. Extra Stength**. Portable for travel. Preservative, drug, iodine, BPA, gluten & latex free. Isotonic - sodium chloride 9 mg/mL of water or hypertonic 18 mg/mL of water Premixed packets of USP grade sodium chloride & sodium bicarbonate . Excellent cleansing prior to spraying nasal corticosteriods. pH Balanced & isotonic or hypertonic depending on the dilution. Suitable for use after sinus surgery & during pregnancy. Consult your physician with.