The Water Hairbrush is an innovative hairbrush that allows astronauts to more easily wash their hair. One of the titles that were thought of included the Portable Shower; because that is what it is. It allows astronauts to more easily wash their hair using water and the "rinse less" shampoo. It's no secret that often, the astronauts must use water to help spread and get rid of the shampoo, so to help them do this, the Water Hairbrush was created to spread the water and shampoo around and in the hair more easily. It functions by using the water bags to squirt water up the handle of the hairbrush, coming out of holes placed among the pins of the hairbrush and into the hair, aiding the astronaut.