Sweatproof sunscreen?

I recommend these. They're water and sweat resistant. They're also lightweight and leave a natural to matte finish, perfect for oily skin.

I solemnly swear by this one. I sweat easily and in my experience, this one is rather resistant to sweat. I do have to add that I'm absolutely not the sporty type, so I don't really know how it holds up when you're running during hot and humid weather, for example.