Systane Ultra UD Lubricant Eye Drops are lubricating ophthalmic drops packaged in 30 convenient single-dose packets of 0.7 mL each. Systane Ultra UD Lubricant Eye Drops provide immediate and short-term relief from symptoms caused by contact lens use, wind, cold, heating and air conditioning, pollution, and other factors. You may carry them with you wherever, even work, in a tiny handbag or shoulder bag, or simply in your pocket, so they are always there when you need to rehydrate your eyes.