In this kind of weather, you need to apply it not only to your face but also to the back of your neck.

On days with such strong sunlight, I shouldn't just apply it to my face; I need to make sure to apply sunscreen to every part of my skin that is actually exposed.

Last summer, I applied sunscreen to my face and spent a long time outdoors, but when I got home, I found that even the back of my neck, where I hadn't applied sunscreen, had sunburned. ㅠㅎ So when I looked in the mirror, the front of my neck was fine because I had applied it to my face, but the back was so tanned that it looked like half my skin was dry. ㅋㅋ ㅠㅠ So, if you are planning to be outdoors for a long time, I think you absolutely must apply sun protection to any exposed skin areas.

Since the neck area tends to sweat a lot, I think using a matte sun stick would be suitable. I use a sun cushion on my face, and sun sticks from Plant Nara or AHC on my neck and arms!