How to dress baby in the house?

Mom of Boys • Mom of boys ages 9 and 4. Third baby boy born Jan 2nd 2018 💕

I’m just wondering what everyone puts on their baby when they are in the house? My son just turned 3 weeks today. He is always sweaty now and I’m wondering if maybe I’m putting too much on him, but I’m scared if I leave him in just a onesie he will get sick.