What does baby wear to bed

Our 8 month olds wears a fleece footed pajama to bed. Our heat is ranging anywhere from 63 degrees to 68 degrees in the nigh. Old house and system is wonky and all over the place. So I now out socks on her bc her feet hot cold. But should I be putting a short sleeve onesie underneath the fleece?? Her core seems warm but sometimes her hands get cold too. What do you mamas do?