I'm wondering what types of layers I should look for to get my DS through the Chicago winter. He mostly travels by car and we babywear when we get to out location. I realize he's not supposed to wear puffy coats or buntings in the car seat. He also runs hot so I don't want him to get over heated in the Ergo.
LO will be 5 months next week and he's already wearing 9 month sizes. What essential layering pieces should I have to put over long sleeved onesies and pants?