Hylo-Dual Preservative Free Eye Drops are for use on dry eyes caused by allergies. It also helps to stop itching and burning. HYLO®-DUAL is the only preservative-free eye drop with precise dosing specially formulated to combine (0.05%) Sodium Hyaluronate and (2%) Ectoin. The drops create a protective shield from pollen, dust particles, animal hair and other environmental allergens. They can be used with contact lenses and are suitable for adults and children 6 years and over.