The Thera-Pearl eye mask can be heated or cooled to help relieve dry & puffy eyes, as well as sinus-related headaches. The mask can be cooled in the freezer & used to alleviate puffy eyes & sinus headaches, while the heated mask relieves dry eye, blepharitis, & nasal congestion. Place it over your eyes & sinuses, or alternatively slide it up to your forehead; its adaptable shape will mean it stays put without drips or leaks. The innovative Pearl Technology retains its temperature for 20 minutes leaving a lasting soothing sensation. Simply microwave or freeze to reach the desired temperature. Carefully read directions for use before application. Always check with your doctor before using on broken, irritated, highly sensitive or insensitive skin. Always test pack temperature prior to application. Overheating or prolonged application may cause injury, including burns. Heating beyond the suggested time may damage or destroy Thera-Pearl pack. Use only under adult supervision.