Systane Ultra UD is a preservative-free lubricant eye drop containing Polyethylene Glycol 400 0.4% and Propylene Glycol 0.3%. It comes in convenient 0.7ml single-dose units designed to provide temporary relief from eye dryness, irritation and burning sensations. This preservative-free formulation is specially designed for sensitive eyes and contact lens wearers. Each unit dose vial should be discarded after single use. The drops can be used as needed throughout the day. Store at room temperature and keep away from direct light. If irritation persists or vision changes occur, discontinue use and consult an eye care professional. Not recommended for use if allergic to any ingredients. Keep out of reach of children.