Popband London Popmask Sleepover 5 Pack. Our warming and relaxing self heating eyemasks start warming withing 30 seconds and last for over 30 minutes. Our eyemasks will sooth tired eyes, increase circulation to eliminate dark circles, add moisure to dry eyes, ease migraines, tension headaches as well as helping you get the best nights sleep ever! # Pieces In Set: 5 Features: Heated Country of Origin: Imported