Our 6 month old daughter wears a vest and a baby gro, and sleeps in a 2.5 tog sleeping bag with a double over cellular blanket over her. Sounds like a lot but its been pretty damn cold in the middle of the night in our room and although her head is warm, she wakes up with hands like ice cubes! We've put a long sleeve vest under the baby gro tonight so she has two layers on her arms. What do other people dress their babies in during the cold winter months?