This great mask works as a cold or hot compress. Use cold to relieve eye puffiness and fatigue. Use hot or cold to relieve sinus, tension and migraine headache pain and pressure. The beaded gel holds temperature longer than gel alone and the large size of this mask is zoned for eyelids, under eye, temple, forehead, sinuses and cheek. Each zone is partitioned to keep the gel from sliding, a real bonus over most masks.  An Adjustable strap keeps the mask in place. Great for women and men!