My son has issues with major ear infections and it was suggested by the doctor to use a hat with flaps so when I saw this I was delighted (as it is EXTREMELY difficult to find a hat with flaps and a chin strap for a boy.) However the sizes are extremely vague so I emailed customer service. My son is 19 months old and I wasn't sure what size to get. It was suggested to get the 2-4 toddler size so I did. It wasn't exactly what I thought and it is VERY large for my son's head (and he's in the 95% percentile for head circumference).
The quality does seem good but it's just way to large to do the job I need it to do.