Brief Description: [Zero Light, Eye Relaxation] Sleep Eye Mask, 99.99% Light Blocking, Sleep Aid, 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 standby indicator lights 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 eye 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] Feather-light wearing comfort. For tired eyes from working at home, block out the light and enjoy deep rest. This is a rest eye mask with zero pressure for eyes that have been overworked all day. This lightweight eye mask brings peaceful sleep. [Adjustable x Unisex] With an adjuster, it fits perfectly to any head size. The comfort of not needing size adjustment makes it ideal as an eye mask gift. This sleep eye mask provides a custom-made fit for your daily rest. [Reset your rest in 5 minutes while traveling.] A compact eye mask that can be carried anywhere. This is a sleep aid item that transforms the "spare time" of a busy daily life, from office naps to airplanes and bullet trains, into deep relaxation. It is convenient for travel and portable, and is an easy-to-use eye mask on airplanes.