The Bathmate Hydropump is so named because it uses water as the medium for creating a vacuum around the penis instead of air, which is the basis of all other pumps.
The hydrovacuum it creates around the penis makes for a solid & even vacuum - making for far more uniform and solid erections than are achieved using air-based methods.
Also, because water acts as a lubricant, there is no need to use messy gels and lubes when using Bathmate, as well as helping enhance hygiene.
Of great benefit, the Hydrotherapy aspect of the Bathmate, using water in a cyclic pumping action, makes for an excellent workout of the penile vascular (blood flow) system. This anatomical dynamic is known as hyperemia.
Therefore, the hydropump promotes penile health and increased sexual stamina and enjoyment, as well as boosting the size of the male organ.