I sweat alot, that is just a fact I live with. Today the car hit 90 degrees parked in the sun, and I had the ventilated seats on full blast on the ride home. I can't say that I 'felt' it when it was running, but you definitely notice the moment you turn it off. It'll never cool as much as some of the others but absolutely was effective at preventing me getting a shadow of myself on the back of my pants