How do you protect your hair or scalp from UV rays?

I want to use a product like sunscreen, but even when I search on Naver, all I find are overseas products.

I would like to receive recommendations for any products you know of or use.

I think parasols or hats might be a bit inconvenient to use at the beach or outdoors.

So I want to look for products, but they are all showing up as direct imports.