Living in Chicago, we deal with harsh winters. My babies have been in one kid coats since they could fit into the 12m coats. We started with the down, but this year when we needed to upsize, we went for the Arctic because we had -30 degree Fahrenheit days! This coat kept my daughter warm and SAFE in the extreme temps. She didn’t have to freeze before or after the car and I knew she was safe in her car seat because of the double zipper. My kids are small so the size 4 will last us a couple seasons for my eldest and then a couple seasons for my youngest. Yes, there’s an expense, but it’s worth it!