The ONZEN

£10,000
£10,000 £11,900
The ONZEN
The ONZEN
The ONZEN
The ONZEN
The ONZEN

The ONZEN

The ONZEN

4.6 / 5 (243 reviews)
£10,000
£10,000 £11,900
Sale Sold out

Transform your life with the most advanced cold plunge on the market.

  • Powerful 37°F (3°C) cooling, spacious interior, head-turning design.
  • Smartphone connectivity for convenient control.
  • All-in-one, plug-and-plunge setup.
  • Effortless maintenance with easy swap filter system.
  • Fits individuals up to 6'8". 
  • Free expedited delivery
  • 5-Year full product warranty
  • Global maintenance network
  • 30-Day Refund Policy

Specifications

Materials & Build Quality
Lightweight, durable, premium Japanese Mizuburo Acrylic reinforced with fiberglass for added strength. Built to last a lifetime.

Cooling Technology
Fully-integrated, proprietary and highly advanced 1.5HP medical-grade cooling system, similar to those used in hospitals and semiconductor manufacturing facilities.

Control Unit
Official Sony electronic control unit, designed for medical applications. Our latest Sony microcontrollers ensure the electronic components don’t break under cold or heat stress. It is also 100% waterproof, enhancing durability and safety.

Shipping & Delivery

We offer free expedited shipping (10-14 days).

You may return the product you have purchased within 14 days of
receiving it for a full refund, but only if the item arrived damaged or incorrect. Please read our Refund Policy for more info.
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Let customers speak for us

from 243 reviews

Best purchase I’ve made for my home spa.

Andrew Caldwell
Onzen

Onzen’s premium build and beautiful design make it a standout. Setup was easy, and the customer service was excellent. It’s so user-friendly, too.

Daren Langston
Onzen

The minimalist design adds a modern touch to my home. It was easy to set up, and the build quality is fantastic. It’s also really simple to use.

Kellen Murdock
Onzen

Onzen is beautifully designed and built to last. The Japanese aesthetic is sleek, and setup was easy. Customer service was prompt and helpful. Couldn’t ask for more.

Arvin Palmer
Onzen

Onzen’s build quality is solid, and the Japanese-inspired design is sleek and modern. Setup was quick and easy, and it’s incredibly simple to use.

Lowell Tanner
Onzen

I love the high-end Japanese design of Onzen. Setup was simple, and the product feels incredibly durable. Customer service was fantastic throughout the whole process.

Theo Blackwell
Onzen

Onzen has a beautiful, sleek design with amazing build quality. Setup was fast and easy, and the customer service team was incredibly helpful. Highly recommended.

Lennox Farley
Onzen

Onzen’s design is sleek and minimalist, inspired by Japanese craftsmanship. Setup was a breeze, and the quality is unmatched. Super easy to use, too.

Celeste Voss
Onzen

I was impressed by how quickly and easily Onzen was set up. The design is beautiful, and the build quality is excellent. Fantastic customer support as well.

Maren Whitaker
Onzen

The Japanese design is elegant, and the build quality is incredibly durable. Onzen was easy to set up, and it’s very user-friendly. Highly recommend.

Sage Rowley
Onzen

It looks amazing in my home. It was easy to set up, and the build quality is fantastic. Great customer service experience too.

Bryce Linton
Onzen

Classy, durable, and easy to set up. Onzen’s Japanese design is absolutely stunning, and the build quality is top-tier. Highly recommend this cold plunge.

Camden Hollis
Onzen

Onzen exceeded all my expectations. The Japanese-inspired design is elegant and stylish, setup was easy, and the quality is exceptional. Customer service was fantastic

Elias Stanford
Onzen

Onzen’s elegant design and durability make it a standout product. It’s incredibly easy to use and set up, and customer service was excellent.

Nolan Fraser
Onzen

This is one of the best purchases I’ve made. Onzen is beautifully designed with a sleek aesthetic, and it was so easy to set up and use.

Thane Caldwell
Onzen

ONZEN vs. the competition

  • Cheap tubs

    ONZEN

    Other premium tubs

  • Price

    $2,000-$5,000

    $7,999

    $8,600+

  • Package

    Accessories often sold
    separately at additional cost.

    Comes with everything you need - including one spare filter.

    Accessories often sold separately at additional cost.

  • Materials & Build Quality

    Cheap, flimsy inflatable PVC, sometimes requiring plastic support props.

    Lightweight, durable, premium Japanese Mizuburo Acrylic reinforced with fiberglass for added strength. Built to last a lifetime.

    Acrylic material varies, with some made from cheap plastic compound Acrylonitrile Butadiene Styrene, causing discoloration of tub over time.

  • Cooling technology

    External, non-integrated cooling systems that lack power efficiency and have limited cooling capacity, leading to longer wait times to reach desired temperatures.

    Fully-integrated, proprietary and highly advanced 1.5HP medical-grade cooling system, similar to those used in hospitals and semiconductor manufacturing facilities.

    Fully-integrated, efficient, and rapid cooling systems, but may not utilize medical-grade cooling technology, which ensures reliability and precision in every application.

  • Control Unit

    Out-of-date control units that utilize basic technology, which may lead to long-term reliability and durability issues.

    Official Sony electronic control unit, designed for medical applications. Our latest Sony microcontrollers ensure the electronic components don’t break under cold or heat stress. It is also 100% waterproof, enhancing durability and safety.

    Advanced electronic control units. Usually waterproof and built to endure extreme temperature variations.

  • Shipping & Taxes

    Varies

    Free global express shipping. All taxes included.

    Varies

  • Returns

    Varies

    30-Day Refund Policy.

    Varies

  • Warranty

    Usually no warranty.

    5-Year full product warranty.

    Varies, usually 2-3 years

Pure innovation.

Our engineers in Japan developed a proprietary, highly advanced cooling mechanism that can cool the water down faster, while using less energy.

Head-turning design.

Our fully-integrated design puts the cooler inside the tub, creating a streamlined exterior, and an easy and simple plug-and-plunge setup.

  • Japanese Mizuburo Acrylic.

    Specialty Japanese acrylic made with folded microscopic air vacuum layers for unparalleled thermo insulation. This is backed by a thick layer of Japanese thermal foam to further insulate the tub to ensure the water stays cold for as long as possible with minimal heat seep.

All it takes is four steps.

  • 1
    Plug in
    Door-to-door delivery. No professional installation required.
  • 2
    Fill up
    We suggest placing your tub near a water source for convenience.
  • 3
    Set temperature
    We recommend starting at 50-60°F (10-15°C) for beginners.
  • 4
    Plunge
    Get closer to your goals, one plunge at a time.

Frequently asked questions

Why is it so expensive?

Our cold plunge has been designed and engineered using the most advanced cooling technology, optimized for speed and energy efficiency. It also has the latest generation NSF50 certified 20-micron filter system, to ensure the water stays 100% disinfected and bacteria-free.

Furthermore, by regularly cold-plunging, you will be able to avoid future expensive medical bills, because your immune system will be better able to defend itself against future diseases and health issues.

What if I don't know how to use it?

Please read our step-by-step guide on how to use our cold plunge.

If you have any further questions, we also have a dedicated customer support team at your disposal 24/6.

Is cold plunging safe?

Cold plunging is safe, EXCEPT for people who have heart, blood pressure, or respiratory issues. If you have one of these issues, please consult your doctor before cold plunging.

How often should I cold plunge?

That would depend on your physical state, age, and goals, but one 10-minute (max) cold plunge session per day would be enough for even professional athletes.

How effective is cold plunging?

Cold plunging has been scientifically proven to offer the following health benefits (and more):

  • Elevate energy levels.
  • Boost performance and recovery.
  • Strengthen immune system.
  • Release endorphins, improving mood and lowering stress levels.
  • Reduce inflammation and chronic pain with the boost in norepinephrine.
  • Reduce stress and anxiety by decreasing the stress hormone cortisol.
  • Significantly improve sleep quality.

For more info, please read our Why cold plunge article.

How do I know it will work for me?

Please read our What is cold plunging article to see how The ONZEN will work for you.

*We have a 100% money-back guarantee if the product arrives damaged, as well as a 5-year full product warranty.

Can children cold plunge?

It is not recommended that children under the age of 16 cold plunge, because childrens’ systems for regulating internal temperature are still developing.

However, should your child wish to cold plunge, it should not be longer than two minutes, and the temperature should at least be 50°F (10°C).
5 Things You Need To Know About Cold Plunging
View PDF

Have questions?
Contact us.

We'll get back to you within 24-48 hours.

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