My son is now wearing grobag 2.5 tog at night time, bought from Mothercare. It's quite good, the only thing is before he fall-asleep, he used to turn and turn so that the bag will be twisted around his body which I found it's not so free for him. This is only a minor thing, overall good.
Veronmac,
Thanks for your information. As Grobag is 背心形, do you still need to cover a quilt or thin blanket over the grobag sleeping bag? Coz I don't know if BB 手仔 will cold or not.
If the weather is very cold then I will let him wear thicker pajamas + quilt/blanket on top, otherwise, no need to do so. You can speak to the sales or find out from the information pack.