Whether you choose to tan with The Water or Hydra-Mousse is really down to your own personal preference.  Hydra-Mousse is a smooth, velvety foam that is designed to be pumped onto a tanning mitt and glided over the skin. The Water is designed to be applied as a light mist, ensuring that the skin is saturated with the product and then buffed into the skin using your tanning mitt. The end result of both products is designed to be the same, it’s really just your preference in formulation!