i had the same questions too! u can check with the ifc on the temperature and their recommendation on what to wear, as well as if swaddle is allowed. mine is around 25 degrees and allow swaddle + blanket. I send her in short or long sleeves, legs fully covered in pants n socks. my girl is 3m, and goes through up to 4 bibs a day - 1 she wears there and extra 3 pieces. I didn't pack enough initially!