MYTREX Eye Mask is designed in Japan by a doctor of health science with unique technology. When looking at a short distance such as a personal computer or a smartphone, the sympathetic nerve is still on. By warming the eyes and the muscles around the eyes, blood flow is improved, and by supplying muscle oxygen, the muscles around the eyes are softened and the autonomic nerves are improved. Graphene is a new material that won the Nobel Prize in the 21st century. It features thin & lightweight with excellent thermal conductivity. MYTREX Mask heals your eyes with the far-infrared rays ( wavelength of 6-14μm emitted when heating ). MYTREX Eye Mask applies comfortable & flexibility material, its unique 3D design that fits gently and effectively bring your eyes warm heat. Because there is 0 pressure, it heales your eyes while relaxing comfortablely. In addition, because it is a velcro type, you can adjust it to the size that is right for you easily. MYTREX Eye Mask adopt 3D design which does not directly heat eyeballs. By heating the moisture in the air of the eye mask, steam is released, and the comfortable steam heat gently wraps and heals the eyes. Recommended for those who spend much time on smartphones and looking at the screen too much. MYTREX Eye Cup adopt humanize design with temperature adjustments of 38°C, 40° & 45°C. MYTREX sleeping mask can be used repeatedly & economical. With automatic OFF timer (after 60 minutes) & lightweight is convenient to carry.