Not a heavy fleece but perfect for going from car to house, car to store etc.  I got the 12 month size for my 7 month granddaughter and it fits. She is in the 95% on the baby size chart, so she is larger than the typical 7 month old. She is now 8 months and the snowsuit still fits but we can no longer hide her feet in the feeties but I found a very nice Robeez boot to keep her feet warm.  The 18 month size is huge and I returned it. (yes I did order both the 12 mo and 18 mo to see which would fit her best).  Washes well.