Systane Pro Preservative Free Lubricating Eye Drops is a triple action formula that hydrates, restores and protects dry eyes for up to 12 hours of dry eye relief. Systane Pro Preservative Free contains the active ingredient propylene glycol to lubricate and soothe dry eyes, and contains hyaluronate. This unique formula helps lock in moisture to reduce tear evaporation, and provides long lasting hydration. Systane Pro Preservative Free comes in a convenient 10mL multi-dose bottle, perfect for on-the-go use to keep your eyes comfortable and moisturized wherever your day takes you.