Floatation is a term that refers to ultimate relaxation in a zero gravity environment. It has also been called Reduced Environmental Stimulation (REST) or sensory reduction. Participants float in a warm, dense solution of water and Epsom Salts in a light proof and sound proof chamber. The floater may choose a quiet float or opt for piped-in relaxing music or hypnotic suggestions. The float may be dark or with a light on, and the door to the tank can be left open or closed. Either way, it is a totally private and deeply relaxing experience.