Everyone will want this FINA-legal suit

On a serious note, in the 1970s or 80s, there was a spray-on swimming enhancer called "Time Off" which was supposed to reduce drag by breaking surface tension (and hence the viscosity) of the water surrounding the swimmer's body. It was in fact a concentrated form of a surfactant (like what is used in shampoo) which was liberally applied to the swimmers hair and body during a pre-swim shower. In addition to spraying it directly on the body, loading up the hair under the cap and allowing it to leak out while swimming was a common technique of dispensing it into the water ahead of the swimmer itself. Contrary to the common misconception that "it made the swimmer's body smoother", covering the body with the stuff was simply a method of dispensing the surfactant into the "aqueous envelope" around the individual swimmer instead of putting it in the whole pool. Obvioulsy when FINA got wind of it, they declared it as being an "illegal substance" and subsequently banned. D2

On a serious note, in the 1970s or 80s, there was a spray-on swimming enhancer called "Time Off" which was supposed to reduce drag by breaking surface tension (and hence the viscosity) of the water surrounding the swimmer's body. It was in fact a concentrated form of a surfactant (like what is used in shampoo) which was liberally applied to the swimmers hair and body during a pre-swim shower. In addition to spraying it directly on the body, loading up the hair under the cap and allowing it to leak out while swimming was a common technique of dispensing it into the water ahead of the swimmer itself. Contrary to the common misconception that "it made the swimmer's body smoother", covering the body with the stuff was simply a method of dispensing the surfactant into the "aqueous envelope" around the individual swimmer instead of putting it in the whole pool. Obvioulsy when FINA got wind of it, they declared it as being an "illegal substance" and subsequently banned. D2