I have a bunch of Halo sleepsack swaddlers and non. I figured that's what she'd wear to bed with a regular onesie under to start. For some reason I am now fixated on what she will wear when and that in all my hand-me-downs, I won't have what I actually need. I feel sufficiently clueless right now about basically everything.
Re: What to wear under sleepsack?
Don't worry, you'll figure it out along the way. And you can always run out and buy something else if you feel like you don't have what you need!
We'll be using the Miracle Blanket to swaddle and will probably just put him in a short sleeve onesie underneath. DS1 was born in the winter, and he wore LS cotton sleepers under his swaddle.
i have been putting on footie pj's under them. normal babies might not need so many layers now though, but i just had my lo 5 weeks early, so he gets cold easily.