Review (5/5): Good
It's good. It's just good. If this thing does not prevent you from having that awful round marks below your arm pits after a regular hot days, nothing will, period.
It also has the plus it does not have any kind of smell, it's antiallergic (believe me, it is), it's not a nuisance on your clothes (It leaves stains if you use it right away but they are easy to clean), it protects you from body odor for a long time (I don't know about two days, though, anyhow, I take a shower at least once a day so I definiteley use it daily), and it lasts a lot, from three to five months, depending on how much you use it.