This deodorant is a wonder, it works fine more than a conventional deodorant. Moreover, it has no smell and is very sweet to apply to the skin. It is an unknowable duration, it's simple since I bought it I put in every day and I still have not seen the so diminished economic stone more! The only downside is that you have wet before put so can not use it in all circumstances but once in the morning is enough for the whole day. I highly recommend it!