A:Answer Hi Teds, thanks for your question. Yes, these headphones are designed to be comfortable even when you sleep. With its lighter-weight design, you'll barely notice you're wearing them. However, if you are a side sleeper it may not be comfortable to use. Also, please take note that if you use the headset at a place where it is restricted to use Bluetooth devices such as on an airplane, you can use the headset as noise canceling headphones while the headset is connected to a device via the supplied headphone cable and the headset is turned on. You can check our Support site for more details. Hope this helps.
The WH1000XM4 is a new design, with intelligent and intuitive Ambient Sound Control features that include improvements to Multipoint connection and our industry-leading Noise Cancelation, exceptional sound quality, and Smart Listening that adjusts to your behavior and location. If you haven't already, please check our Sony Headphones Connect app which will let you fine-tune your music to your liking! ~Earl
