Sinus Box Nasal & Sinus Rinse Kit 25 SachetsSinus Box Nasal & Sinus Rinse Kit is a complete cleansing system designed to gently wash and moisturize the nasal passages and sinuses. Each sachet contains a precisely balanced isotonic saline formula (sodium chloride + sodium bicarbonate) that helps relieve nasal congestion, sinus pressure, dryness, and allergy symptoms. When mixed with warm distilled or boiled water, the solution rinses away dust, mucus, allergens, and pollutants, helping restore