sun stroke prevention

[babyjames]

Hi,
I am aware that I need to keep children hydrated and in the shade as much as possible. Does anyone know of a good hat that a 13month old would find difficult to take off? I can't get him to keep the hat I have on his head and we go abroad in 7 weeks and I'm worried about him burning his head as he hardly has any hair.
Hope someone has some ideas!
Thanks

[Sirzy]

I put suncream through Ds hair so when he pulls the hat off he has some protection