Hot & Cool Gel Eye Mask Chill it in the refrigerator for drowsiness or before applying makeup. This eye mask can also be warmed in 40°C water to soothe tired eyes, offering two uses in one. I'm selling this because I haven't used it since I received it. Instructions are written on the cover, so please check the water temperature and cooling methods before use. Stored at home. I have a cat. Please refrain from purchasing if you are concerned. Instant purchase is welcome.