What does your baby wear?

At the risk of sounding dumb, what does your baby wear on an average day when you are just hanging around home? I have been putting my son in footed pajamas, which seems appropriate for the temperature in our house. But this makes me wonder... What the hell are onesies for? Is this what he is supposed to wear for the majority of the day and then pajamas at night? Won't his feet and legs get cold in just a onesie? This is puzzling me. I'd appreciate your input! 😘