Xlear Drug Free Fast Relief Sinus Rescue Nasal Spray helps clean, moisturize, and rinse away nasal congestion, allergy irritants, and other harmful pollutants. Xylitol also has cleansing benefits; it almost acts like soap for your nose. Herbs and essential oils have long been used for natural relief from dozens of ailments. Xlear Rescue features herbal supplements like Pau dArco, and essential oils like oregano, parsley, eucalyptus, and tea tree to give you fast, effective relief when you need it most.