The secret is the patented, natural saline spray containing xylitol—an ingredient which cleanses and moisturizes. Normal saline nasal sprays can dry out the nasal passage, actually leaving it more irritated and susceptible to external contaminants. But with the addition of xylitol, Xlear Saline Nasal Spray with xylitol will moisturize and soothe your sinus and nasal passages.