Float Therapy — Sensory Deprivation Pod

Floatation therapy, also referred to as REST (Restricted Environmental Stimulation Therapy), is the centrepiece offering at Freeze & Float Spa in Chicago's River North neighbourhood. The experience takes place in a purpose-built pod filled with body-temperature water (approximately 93.5°F / 34°C) that has been saturated with roughly 1,000 lbs of pharmaceutical-grade Epsom salt — magnesium sulfate — creating a specific gravity high enough to make any body…

The float environment at 371 W Ontario Street is engineered for complete sensory reduction. Each of the spa's five private pods can be darkened to total blackout and quieted to near-silence, removing the two dominant sensory inputs that ordinarily keep the nervous system active. In this environment, the brain rapidly shifts toward slower brainwave states associated with deep relaxation and early-stage sleep, while physical tension dissipates as muscles no…

The Epsom salt medium delivers a secondary benefit: transdermal absorption of magnesium, a mineral that many adults consume in insufficient quantities. Magnesium plays roles in muscle contraction and relaxation, nerve transmission, and sleep regulation. Athletes in particular have used floatation therapy as a recovery tool, citing reduced next-day soreness and faster return to training.