I have these explorer hats for both my son (18 months) and daughter (4 years). Both kids have been wearing them pretty much every day for two summers now and they are the most fantastic hat I have ever come across. The strap under the chin doesn't bother them, it's easily adjustable (both the head and neck) and most importantly, it protects their faces and necks from the sun while keeping them cool. From a day at the beach to a day on the boat, this hat gets five stars from me every day - I couldn't recommend it more!
Great hat. My 8 y/o and 6 y/o wore it every day while at the beach for a week, in and out of the water, with very few complaints.
We do a lot of hiking and this hat protects his neck and is light weight. My child wears it swimming and it drys quickly.
Very light hat, it's very good for summer time.