My LO is going to have to go into his own room in the next few weeks as he is getting too big for his carrycot and his cot bed is way too big for our room. I've got a couple of 2.5 tog sleeping bags but I'm not sure what he's supposed to wear under them? At the moment the room temperature is about 21 degrees, would I be better getting a 1 tog bag to use until it gets colder? It's so confusing and I'm paranoid about over heating!! X