Wonderful product, light weight, easy to make adjustment per the head size. I bought it for my 2.5 years old, a bit large (he has normal size head) but we can easily adjust it to fit him. Plus, the rope help stablize the hat with a running around toddler.
The fabic is great for travel as well, as you can tuck it in your luggage and pull it out without changing the shape of the hat.

The only reason I give it 4 star is my son does not want to wear it, he claim it is too large. I guess I need to do more convincing work.