I love this sleep mask so much that I just bought a 2nd mask so I can keep it in my travel bag and never be without it! I've had my 1st mask for over a year and I use it all the time. The one I just bought appears to be exactly the same as the one I bought a year ago. I listen to sleep meditations whenever I have problems falling asleep, so this lets me listen without waking up my husband!The description says battery life is 12 hrs, though I only listen for about an hour, and then I plug it back in when I wake up (and leave it on the charger until the next use). That said, I've never had any battery issues.The sleep mask part of it is very comfortable - it has padding to keep the mask off my eyes and block out all the light. The inside is a smooth synthetic fabric, and the band is elastic with Velcro.You can wash the mask in the washing machine - just take out the headphone module (easy to do), wash, hang to dry and reinsert the headphone module. You can also move the headphones (small, flat speakers inside the mask) to match where your ears are.This product isn't going to give you awesome acoustics since it's just tiny little flat speakers that hover next to your ear - and I don't use it to listen to music for that reason - but it's perfect for white noise, gentle music, audiobooks, guided meditations and audio like that. It would probably be fine for music, just not awesome.Overall I highly recommend this mask (I mean, I did come back to buy a second one lol). If you're considering it, just buy it, you'll love it! Enjoy!