I recommend mascara and eyeliner specifically for water activities.

I wasn't trying to figure it out, but

I naturally discovered it while playing in the water~

Without using a separate waterproof product

I used the product I usually use, and it didn't break down.

"Kiss Me Brush Pen Eyeliner" and

It's the Clio Black + Red Mascara.

Give it a try when playing in the water.