Comfort Gel Mask, Soothes headaches and relieves tired eyes . The Gel-Eye-Mask can be used cool or warm. Use it to relieve headaches, migraine and sore and irritated eyes. Cool use: place in refrigerator(not freezer) for at least 30 minutes, then apply for 5 to 10 minutes for a sure relief of headaches and tired eyes. Warm use: piace in hot (not boiling) water for abt. 5 minutes, then apply for 5 to 10 minutes for relaxing treat-ment. this Gel Eye Mask is manufactured from sturdy vinyl and filled with a non-toxic gel.