I took it out of the bag, but decided to use something else, so I haven't used it at all. Please refrain from purchasing if you are concerned. Eye Mask: Ultimate Light Blocking, Zero Light This 3D立体形状 (three-dimensional) eye mask provides a good fit! Color: Black [Domestic Certification (QTEC) ・ Pursuit of Zero Light] 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 sometimes get used to the darkness and still feel a little light? This sleep eye mask achieves the ultimate "light blocking" environment, preventing you from feeling any light. [3D立体構造 (three-dimensional structure) ・ Nasal Bridge Synchronized Design] The uniquely developed three-dimensional cut does not touch the eyelids, protecting eyelash extensions and eye makeup. The "synchronous fit structure" is adopted for the nose area to block light leakage from gaps. This next-generation sleep mask model has 99.99% light-blocking performance and adds a pressure-free breathing sensation. It is optimally designed as a sleep mask. [Eye Relaxation ・ Lightweight Design] It feels as light as a feather. Block out the light and take a deep rest for tired eyes from working at home. This is a rest eye mask that provides zero pressure to the eyes that have been overworked all day. This lightweight eye mask brings a good night's sleep. [Adjustable ・ Unisex] With an adjuster, it fits perfectly to any head size. It's comfortable without the need for size adjustments, making it ideal as an eye mask gift. This sleep eye mask provides a custom-made fit for your daily rest. [Great for Various Scenes] This is a sleep 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 carrying, and is an easy-to-use eye mask on airplanes.