ok well I'm ashamed to tell this, but I will. During my testing I left all my makeup on because I had read that you can sleep in it if you want. So I did that. The next morning I did NOT have to re-do my makeup at all. Sooooo I figured ok, I'll see just what this stuff does, and I left it on all that day and slept in it the second night. The next morning same thing..... I still had makeup on. So we had to go out of town to go visit my brother and family so I left my face as it was. Now mind you, sleeping it it two nights, cleaning house, sweating.....using a paper towel on my face to wipe the sweat..... While talking with my sis-in-law she comments on how nice my makeup looks I said huh? I've had this on three days and slept in it two nights, she couldn't believe it. After sleeping in it the third night, I finally washed it off. And then Moonrose from here, she tested hers by sleeping in it two nights also and then went swimming in it.... and STILL had makeup on! So, I don't believe you have to worry about it wearing off during the day