The adjustable knot actually works — I loosened it a bit and it still stays snug around my baby's ears without slipping. The organic cotton feels soft against her forehead, no redness after a full nap.
Bought this for my three-month-old and the adjustable knot at the top is genius, it actually grows with his head instead of getting tight after a few weeks. The cotton keeps his ears warm on stroller walks without making him sweaty.
We've washed this hat a few times already and the cotton stays just as soft, plus the snug fit over the ears hasn't loosened one bit. The little knot on top is cute when she's awake and lies flat enough for naps, which is exactly what we needed for the colder mornings.