hydraSense Ultra Congestion relief for Allergy congestion works quickly to relieve indoor and outdoor nasal allergy symptoms such as nasal congestion and sinus pressure. hydraSense Allergy saline nasal rinse helps reduce seasonal nasal allergy symptoms caused by hayfever and cleanses nasal cavities to help eliminate excess mucus. hydraSense Ultra Congestion relief for allergy congestion is made with 100% natural source hypertonic, undiluted, sterile seawater and is free of medication, chemical additives or preservatives. Product information is provided by the product vendor. This content is a summary for informational purposes only and does not have all possible information about this product. It should not be used as a substitute for advice from health care professionals, as this information alone does not assure that this product is safe, effective, or appropriate for you. For more detailed information on this product, including reported and possible side effects and contraindications, refer to the manufacturer's monograph, or speak with a health care provider.