My DS is 18 months old and, seeing as it's summer, I haven't been putting a vest on him lately. He wears just a t-shirt, or a jumper if necessary, but would surely be too hot in a vest too?
According to my mother, I am "an evil mother" for not putting a vest on him - and she was only half joking. So does everyone else put vests on their toddlers at all times no matter what the weather? Must have missed that one in the rulebook.... 