What does your baby wear for bed?

Liza

We have cold winters and we keep the heat at 70 degrees in my son’s room. He sleeps in fleece footed pjs and a long sleeve onsie underneath. I feel like he is still too young for a blanket but sometimes I worry he’ll get cold. I’ve thought about doing a cotton sleep sack but then I worry he’ll over heat!! So I’m just curious what other babies wear to bed in cold climates. Thanks in advance!