Are these good for side sleepers?

Yes. The flat speakers sit against the ear rather than inside it, so there is nothing pressing into the ear canal when you lie on your side. The fabric band also cushions against the pillow.

No. There is no active noise cancellation and the fabric does not seal the ear, so they mask sound only by playing audio. For noisy rooms, sleep earbuds with isolation work better.

How long does the battery last?

Expect roughly a night of listening at low volume, less if you play loudly. Charging is by USB, and a full charge takes a couple of hours.

Can I wash the headband?

Yes, but remove the speakers and control module first. Wash the fabric by hand in cool water and let it air dry fully before putting the electronics back.

Can I use them for calls and workouts?

They handle calls through the built-in microphone, but the mic is basic. They are not sweat-resistant, so they suit light wear, not gym sessions.

Do they work with any phone?

Yes. Bluetooth 5.3 pairs with iOS and Android phones, tablets and laptops. They also have a wired option on some versions for devices without Bluetooth.