Explanation of Light Blocking 【Certified in Japan, 99.99% Light Blocking Rate】 The most important role of an eye mask is "light blocking." In modern times, small lights from charging devices and standby power can be noticeable in a dark room, making it difficult to achieve complete darkness just by turning off the lights. Furthermore, even after turning off the lights, your eyes can adjust and start to perceive light after a while. When choosing an eye mask, it's important to pay attention to the light-blocking rate. 【Ergonomic 3D Structure, Integrated for Both Eyes】 The 3D structure reduces pressure around the eyes and is lightweight, providing comfortable use. For working adults and travelers who want to "recover energy with a short nap," an eye mask is an essential sleep aid. It uses an adjuster or Velcro type (without metal fittings), allowing you to freely adjust the tightness to your liking. 【Carefully Selected Materials for Long-Lasting Comfort】 When used at night, you'll be wearing it for a long time, so it's recommended to choose one with high breathability as well as light-blocking properties. It's a washable material that can be hand-washed, so you can keep it clean throughout the year with regular care. 【Eye Relaxation and Rest】 Recently, with the increase in remote work and time spent at home, the use of smartphones and computers has increased, and more people are experiencing eye fatigue. Wearing an eye mask blocks out light, which is helpful for fragmented sleep when you can't get a full night's sleep, or when sleeping after a night shift. 【Refresh During Travel or Spare Time】 Comes with a convenient carrying pouch, so you can relax anywhere... A useful gadget when you want to take a nap at the office or take a short daytime nap. For busy modern people, "getting good quality sleep, even if it's short" is very important. Why not try incorporating an eye mask? I've used it about twice, but it doesn't suit me, so I'm putting it up for sale. There are no noticeable stains. I will ship it with the black storage bag. Retail price: 2480 yen