Cold Plunge

凍る /’koo,roo/, To Freeze or Be Frozen Over

Take The Plunge

Where Form Meets Function

Kooru Cold Plunge

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Handcrafted In San Diego

We set out to create something beautiful, capable of elevating any surrounding while delivering unmatched performance and reliability. Each of our plunges are handcrafted by skilled artisans.

Cold Plunge Benefits

  • → Reduces Stress (the best chill pill)
  • → Increase Alertness
  • → Reduce Inflammation
  • → Reduce Muscle Aches & Pain
  • → Boost Physical Performance
  • → Weight Loss and Increase Metabolism
  • → Improve Sleep
  • → Boost the Immune System
  • → Improve the Lymphatic System
  • → Enhance Fertility
  • → Cold Water Improves Lung Function
  • → Reduce Cortisol
  • → Increase dopamine
  • → Boost Mood
  • → Build Resilience


Our Plunges in the Wild


Yes, safety came first when designing this tub. If you have specific questions regarding safety, please email us @

Yes! Your tub comes with an ozone filtration system and a 10″ filter to keep your tub clean. This tub was built to be low maintenance and have minimal water changes with proper upkeep.

Water temperature can go as low as 39º F. You can set the temperature to your preference at any temperature below 80º F. Please note the tub does not heat but keeps below the set point.

We recommend this tub for people 6’5″ and 250 lbs or less. XL tub can be made – please email us.
If you are looking to see how deep you can submerge yourself, try sitting on the ground and marking 28 inches on the wall. This will give you an idea of how high you can safely get the water up (the compartment is 30 inches tall). Most people find that this is more than enough to submerge their head if they wish.

Ozone or O3 technology is a common and safe water treatment system using pure oxygen. It is a powerful disinfecting agent and removes the need to use heavy chemicals. In short, ozone is terrific for cleaning water, which is why it is used with advanced drinking water treatment plants in the world.

Yes, our tubs are designed to be indoor or outdoor. If you live in a colder climate, it is important to leave the water circulating  24/7  if temps are below 32 for multiple days in a row to prevent freezing pipes. If it gets too cold for extended periods you may need to drain and empty the tub.