They’re called sleepphones and yes, they’re designed for side sleeping. Basically a headband with speakers. Each speaker is like a C battery, stitched into layers of felt.

The Bluetooth version has a silicon casing with a folding crease in it, to keep it flexible, but it’s several inches long and doesn’t seem to last long before I get whining. Idk how much of that is Bluetooth degradation vs the receiver’s wear and tear from folding or being lied on. It needs regular recharging (micro USB, or i think they have a cordless charge version).

The 3.5mm has a long braided cord, has never whined, and doesn’t have the chunky Bluetooth receiver. It gets charge from the phone. I always know I can use it when I want to.

Sleepphones also sells replaceable parts piecemeal so you can get just a band, just speakers, just BT unit etc.

Aww geez man, that’s even worse! I learned about adapters and figured I’d at least be able to tolerate (but resent) the switch. But that will prevent me using sleeping headphones at all… :/

Definitely the jack. I have special headphones for listening to white noise while sleeping. The Bluetooth version have a chunky panel, and don’t last long before they get that Bluetooth whine. That whine is a deal-breaker is a sleep aid.

So I use the 3.5mm version… if I use the charge port converted to a Jack, I can’t charge my phone while I listen to white noise and I’ll wake up to 6%. Rhe loss or the jack is why I haven’t upgraded my phone in years.