The head support is now really needed in the winter only for early preemies.
Our Leo arrived four weeks early, and a second time, we did not want to squeeze him with hood and cap again in there.
In the summer, it would have worked,
But when the bad weather (March / April 2013) have been small enough to.
The head support is therefore really no longer needed from 50cm.
Leo was 48cm tall and it was only once on it.