I'm not a huge perspire-er (worse than some, better than many), but I do a lot of walking and it's getting warmer. Been applying the roll-on to my underarms and forehead (hard for me to stop the waterworks once it starts up there) and the results have been impressive. It took three nights of applications before I noticed a difference, but then it really did a great job of stopping the drips. If you suffer from the same, give it a try. The name is appropriate - better be certain your pits are completely dry before you roll the stuff on, otherwise it'll sting. Once it starts working, you only need to reapply once every 2-3 nights.