Post-it’s Extreme notes can go a lot of places regular Post-its can’t. They’ll stick to rough surfaces like wood and brick, and somehow, they’re even waterproof. We blasted them with a kitchen sink last year, and the paper never shredded, and the ink never ran.
This pack of 12 pads is down to $13, the best price ever, so if you ever think you might need some of these (you definitely need some of these), go ahead and stock up.