Continuous Heating Tired of your usual microwave eye compress not staying warm after a few minutes? Our masks provide consistent warmth. Comfortable and breathable The warming eye mask is made of cotton and filled with natural flax seeds, which have a perfect touch and cover your eye skin. Flaxseed is used as a non-toxic filler for eye masks. Flaxseed helps enhance the thermal compression effect of the eye mask and locks in moisture. Graphene heating technology Graphene heating element quickly generates heat, touches and heats the eyelids, directly unclogs the glands, deeply relieves dry eyes, eye pressure and puffiness , blepharitis, dark circles, relieves eye fatigue and improves sleep. 3-Level Heating Temperature and Timing Settings The electrically heated eyecups are specially designed with 3-level heating temperature settings from 104F to 140F as well as timed settings (20, 40 or 60 minutes). When the time is up, it will automatically stop working Power supply is simple It is easily powered by PC USB port, power bank, mobile phone charger and comes with nice packaging. Take it with you everywhere.