With motion activated protection 48 hour antiperspirant Aerosol spray Alcohol* free (*ethyl alcohol) Long lasting protection against wetness Long lasting protection against odour Rexona make it their business to know more about sweat, and what they learn informs every product innovation. Sweat, also known as perspiration, is a normal and healthy bodily function and it starts to occur just a few months after birth. We mainly sweat to cool our bodies down, a process called thermoregulation. Our brain sends a signal to over 3 million glands in our body to release sweat (a clear fluid made of water, salts and proteins). As this fluid evaporates from our skin, it lowers our body temperature. Rexona entered the world of professional sports, backing some of the world's best sports men and women. To this day, Rexona continues to provide ultimate protection at even the busiest of times.