This is a weighted eye mask featured on Reiwa no Tora (a Japanese TV show). I've only used it 2-3 times. Perfect for relieving eye strain and promoting restful sleep. This product can be warmed in the microwave or cooled in the refrigerator. [Recommended by a practicing specialist doctor] Sleep-Enhancing Weighted Eye Mask "HIRUNEGAO" Retail Price: 3,780 yen Color: Gray Size: Body length 31cm, Width 63cm, Weight approx. 300g [Point 1: Light Blocking with Weight] The weighted eye mask provides light blocking due to its weight, contributing to deep and efficient sleep. It supports your fatigue recovery at maximum efficiency through the effects of melatonin. [Point 2: Indentation for the Eyeballs] The eye area is designed with a lighter weight. It's designed to fit comfortably with the right amount of weight, allowing you to rest comfortably. [Point 3: Washable Cover] The included cover can be easily removed, and you can wash it in the washing machine if it gets dirty. [Point 4: Adjustable Velcro] The size can be adjusted with Velcro. You can easily adjust the size to fit your face.