Function: Relief of symptoms associated with: 1. Blepharitis, Dry Eye Disease, Meibomian Gland Disease, styes and chalazia. (Hot therapy) 2. Headaches, sunus pressure, tension, swelling and puffiness. (Cold therapy) Instructions: For hot therapy: 1. At room temperature before heating. 2. Insert mask inside protective slipcover (optional) and place flat on clean microwave safe dish. 3. Set microwave power to high and heat for 20 seconds. Before applying, always toch the mask with fingers first, to test the desired temperature, if the mask is too hot, allow it to cool for 1-2 minutes and test again. For additional heat, microwave in 5 second increments until desired temperature is reached. Do not exceed a maximum of 30 seconds of heating. 4. Place mask over closed eyes and secure with adjustable strap if preferred. 5. Wear for 3 to 5 minutes or as directed by a physician. Do not apply for more than 20 minutes at a time. For cold therapy: 1. Insert mask inside protective slipcover (optional) and place in a sealable plastic bag, in the freezer for 30 minutes. 2. Remove mask from freezer and plastic bag and place over closed eyes, securing with adjustable strap, if preferred. Wear for 5 to 7 minutes or as directed by a physician.