Murine Dry & Tired Eyes Drops is a fast soothing relief for dry and overworked eyes and provides up to 8 hours hydration. For dry, tired or overworked eyes, this formulation contains 2 lubricants plus 6 major ingredients found in natural tears. They hydrate, refresh and replenish eyes, soothing away discomfort and alleviating symptoms caused by environmental factors*. They provide protection for up to 8 hours. *such as heating, wind, smoke, dust, computer use, driving, swimming.