It is machine washable, adjustable, and nothing to spoil, it is very cute, it looks a little cavalier.
The only downside is that while the skull is not protected in the event of a shock on top of the head (going up in the corner of a piece of furniture, for example). But I think these vents are there so as not to sweat it (because even with these two great hole, it's hot down there!).
The velcro fastener can cause problems with some babies who tear (which was not the case from my own, contrary to what I feared).
Overall very happy with this purchase.