A cold plunge is deliberate full-body immersion in cold water, typically between 39°F and 59°F, for a few minutes at a time. The vessel can be anything from an insulated barrel filled with ice to a refrigerated tub with filtration and app control. The defining feature is immersion depth and water temperature, not the equipment.
Why it matters when you are comparing products
Because the term covers both a $60 inflatable tub and a $14,000 stainless system, comparing on price alone is meaningless. What separates them is whether anything keeps the water cold for you.
Where this comes up
- Cold plunges — Every vessel and system in the catalog.
- Cold plunge with chiller vs. without — The split that decides running cost.
Reviewed 2026-08-15