I only offer this as an alternative, minority viewpoint because I struggled with selecting earbuds for bed - try bone conduction ear buds.

Caveats being, side sleeping can be uncomfortable depending on head shape and pillow stiffness. Also the audio quality is not as good as traditional buds, but not an issue for most audiobooks or podcasts. For me though, it eliminated the uncomfortable pressure against my eardrum and didn’t trap moisture if I chose to take a shower before bed. I also could hear in case there was something I had to respond to.