Brief Description: [Zero Light, Eye Relaxation] Sleep Mask for Sleeping, 99.99% Light Blocking, Good Sleep, Comfort, 3D, Lightweight, No Pressure, Eye Cover, Travel, Business Trip, Nap, Black, Japanese Instruction Manual Included Detailed Description: [Pursuit of Zero Light with 99.99% Light Blocking] The essence of this eye mask is to block out all light. Even the faint light from charging or the standby indicator can interfere with deep sleep. Don't you find that even when it's dark, your eyes get used to it and you can still feel a little light? This sleep mask achieves the ultimate "light blocking" environment, preventing you from feeling any light. [3D Stereoscopic Structure x Nasal Bridge Synchronized Design] The uniquely developed three-dimensional cut does not touch the eyelids, protecting eyelash extensions and eye makeup. The "Synchronized Fit Structure" is adopted for the nose area to block light leakage from gaps. This is a next-generation sleep mask model with 99.99% light-blocking performance, plus zero pressure and breathability, making it the perfect design for a sleep mask. [Eye Relaxation x Lightweight Design] Feels as light as a feather. For tired eyes from working at home, block out the light and get deep rest. This is a rest eye mask with zero pressure for eyes that have been overworked all day. This lightweight eye mask brings good sleep. [Adjustable x Unisex] With an adjuster, it fits perfectly to any head size. It's a sleep mask that offers the comfort of not needing size adjustment, and is also ideal as an eye mask gift. It's a sleep mask with a custom-made feel for daily rest. [Reset your rest in 5 minutes while traveling.] A compact eye mask that can be carried anywhere. This is a good sleep item that transforms the "spare time" of a busy daily life, from office naps to airplanes and bullet trains, into deep relaxation. It's convenient for travel and portable, and is an easy-to-use eye mask on airplanes.