Pajama Question

This might be a silly question, but what does your baby wear to sleep in at night? I like to still put my little one in the footie pajamas as her feet get so cold when she sleeps. It's getting very hard to find those PJ's in any size over 9 months! Maybe I need to start looking online but at my local stores anything over 12 months seem to no longer have the foot covers on them. Would you just put socks on your little one to sleep? With winter coming in a few months I'm just trying to figure it out as a ftm. Thanks!