Have been putting DS into his grobag in just his vest but I have been thinking he needs more, certainly now it's cooler. DH is a hardy soul who feels the cold less than I do, whereas I am a three-cardigans type, so he thinks one layer is fine. Sometimes he's has cold arms when he wakes in the night, but then again I know overheating them is bad. Today read in magazine it should be vest + babygrow, then sleeping bag. What does everyone else do?