Heh, thanks OP - will have to look in the bags, haven't opened them yet

Problem is not so much worrying about him not being warm enough - more about cooking the poor kid in a Perth summer
Hi hon. I'm another huge GroBag fan. DD has been in them since 10 weeks and is still going strong at 22 months. She's currently in the 18-36 mths size and although I'd be happy to keep her in them until she's 3, we'll probably try her with normal bedding next summer so it won't matter if she wriggles out of the covers as it will be warm. It'll make the transition a lot easier than trying to do it in winter, ITMS.

We are in Perth and I have two bags in each size for DD so 0.5, 1.0 and 2.5 TOG. We are using the 2.5 togs now with her heater on in her room all night (set to between 18-20 degrees). She wears the 1.0 togs in the inbetween weather then her 0.5 togs in summer and with the aircon on during those stinking hot Perth days and nights.

The clothing guide is awesome. We also have the GroEgg which is the nursery thermometer so we know exactly which bag to use and roughly what clothing to put DD in. They are so easy to use. One of my favourite baby items