LO just turned 7 months and I've been struggling trying to find something to keep him warm when we go out. We are still using the infant car seat but I'm not sure for how long because he's getting heavy and also very long.. I don't want to buy one of the covers for that car seat if we decide to change over to the convertible. I can't find him a pram that will fit, because he needs at least 12 months and all of them so far only go up to 9 months. He is getting over a cold and I want to keep him warm as possible when going out. Suggestions?