Why don the larger sizes have the shoulder poppers?
The shoulder popper and side/bottom zip version is ideal for a very young baby because it can be opened out flat for easy night time changes. However, for older and more robust babies, the front zip version is more suitable because an older baby can fiddle with poppers and undo them. The front zip style is still very easy to access for nappy changing and the zip (which undoes from the bottom) is harder for an older baby or toddler to undo, and also means that the zip puller is not at the baby’s chest if he/she wishes to roll over onto his/her tummy. Most front zip version Grobags now feature zip guards to make your baby even more comfortable!
