There are a lot of low-cost sleep headphones on the market, but I gravitated toward this one because it's one of the few where you can remove the inner electronics to wash the headband. The material is reminiscent of yoga pants, very soft and very stretchy and a better quality than I was expecting for the cost. Some reviews on other sleep headphones mentioned dye leaching into their pillows so I ordered the light grey just as a precaution and have not noticed any dye leaching.The sound quality and volume are mediocre for headphone standards, with a lot of treble and not much bass even when using an equalizer app. I have a beanie hat with built in headphones that's a few years old from a different seller, and a few cheap pairs of ear buds; the headphones on this sleep band are ten times better than those, however. So, sound quality is mediocre compared to other headphones, but extraordinary compared to other headphones at this price point, for this use.The volume on these is perfect. They don't get extremely loud and wouldn't be good to wear if you're looking to block out loud background noise (while mowing the lawn, a sleeping partner that sounds like someone is mowing the lawn, etc) but they are perfect for 'normal' sleep environment. I've used this during a thunderstorm and with a loud fan going and can still hear just fine.So far the battery life has exceeded my expectations. I've listened to a 1-3 hour long sleep meditation track every night since purchasing these, and it seems to take up maybe 10% of the battery for a 1-3 hour track followed by being on but not actively playing anything for 6-10 hours after that. I don't like to let the battery get too low on my electronics, so for me one full charge per week covers all my sleep needs. If I was listening to music for the entire night and the headphones were actively playing something for the entire time, that may be different, but I'm extremely grateful to not have to charge every single night.There is a little square on the forehead with play/pause and +/- controls that I thought would be uncomfortable, but I don't even feel it- even when sleeping on my stomach with my face mostly pressed into the pillow. There are small disks where the headphones are embedded in the headband that you can feel if you press into the material with your fingers, but sleeping on my side with all my weight pressed onto my ear I still can't feel the disks in the headband. These are EXTREMELY comfortable, much more than I was expecting.Every night I wake up and the headband is laying on the bed somewhere, likely slipped off from me tossing and turning in my sleep, but it has never been an issue. I use this to fall asleep and don't expect it to stay on while I'm asleep. The fit isn't too tight or too loose, I just thrash a lot during the night. Even if I accidentally roll on top of it in my sleep, I don't feel it and so far there's been no damage to the unit.Overall, for the price, I am truly astounded at the quality. I paid full price for this product, I was not asked to leave a review, I am writing this because I genuinely love these sleep headphones. They've exceeded my every expectation. If anything changes I'll update my review but for now I'm in love.