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The people Cocoon was built for
Founders. Parents. CEOs. Operators. Athletes.
The people carrying responsibility. The people everyone else depends on.
The people who spend their days making decisions, solving problems and managing pressure.
Because recovery isn’t really what you're looking for. You're looking for a way to reset. To regain control of your state.
A way to create two minutes of certainty before the noise begins. That’s what Cocoon was designed to do.
The first 50 Cocoons will include a numbered First Edition certificate signed by Monk investor Anthony Joshua.
If you don’t feel amazing after 60 days of using Cocoon, we’ll provide a full refund. We're that confident.
From the first plunge to the hundredth, Monk customers consistently tell us the same thing: “I use it far more than I expected.”
LIMITED EDITION: FIRST 50 UNITS
Do hard things. Beautifully.
The world asks a lot of you. Deadlines. Decisions. Responsibility. Pressure.
Most people wait until they’re overwhelmed before they reset. The highest performers build the reset into their day.
Cocoon makes it simple.
In minutes you have a calmer nervous system. A clearer mind. A better version of you.
Inspired by Japanese soaking rituals, Cocoon settles effortlessly into homes, gardens, studios, and wellness spaces.
WHAT MAKES COCOON DIFFERENT?
Built for strength and longevity, Cocoon’s reclined, ergonomic interior supports the body in total comfort. Beautiful to look at, even better to plunge in.
One system, two extremes. When paired with our powerful Shiver Pro chiller, Cocoon transitions between ice-cold recovery and soothing heat therapy – perfect for shared homes, or anyone who wants it cold in the morning and hot in the evening.
*Shiver Pro only. The Shiver chiller cools to 3 °C only.
Beneath its seamless shell, Cocoon hides a quietly clever detail: three built-in chiller ports, so you can position your Shiver chiller to the left, right or rear – or place it further away entirely. Cocoon flexes to fit your space and your lifestyle.
At just 71.5cm wide, Cocoon fits effortlessly through standard doorways – yet inside, it’s spacious enough for users up to 6’9”. Designed for full submersion without curling up.
Experience immersive guided plunges with soundscapes, breathwork, and audio coaching. From a gentle 10 °C acclimatisation pathway to anxiety resets, muscle recovery and morning awakenings, Monk supports every stage of your ritual.
Why we made Cocoon
"When we launched Origin (our first product) we set out to redefine what a smart ice bath could be. Beautiful. Integrated. Powerful. And it worked.
But as Monk grew, something became clear. People wanted the Monk aesthetic, the ergonomics, and the performance. But they wanted it in a format that felt more flexible.
They didn’t want an inflatable. But they didn’t necessarily want a large all-in-one system either.
There was a real gap, so we built Cocoon to fill it. I’m utterly obsessed with it."
— Laura Fullerton, Founder & CEO
Key features
Cocoon flexes to your space, budget, and ritual.
Use it as a standalone tub and add your own ice, or connect any Monk chiller (and most leading chillers) – Shiver for cold-only plunges down to 3°C, or Shiver Pro for full contrast therapy from 3-40°C.
Ozone is nature’s most powerful purifier – destroying bacteria, algae, and viruses without harsh chemicals. Shiver Pro has ozone and 2-stage filtration, so you have cleaner water, less maintenance and more plunging.
*Shiver Pro only. Shiver comes with inbuilt 1-stage rinsible mesh filter.
Cocoon’s ‘plug and plunge’ system needs no plumbing – just connect, fill, and dive in. From unboxing to first plunge in minutes, not hours.
Our mighty Shiver Pro chiller is built for gyms, wellness studios, and homes alike. Industrial-strength cooling meets sculptural, interior-grade beauty. Engineered for everyday rituals and professional reliability.
A subtly contoured base guides every drop of water toward the drain. Designed for total drainage and simple upkeep – so you can focus on your ritual, not the rinse.
ACCESS AN IMMERSIVE EXPERIENCE
Most people quit cold plunging. That’s why we built a coach. The Monk app guides every plunge, helping you stay calm through discomfort and build a habit that lasts.
Plunge to guided sessions – breathwork, soundscapes, coaching – built to put you in control. Explore our progressive acclimatisation programme, or 'drop-in' plunges for muscle recovery, morning awakening, anxiety reset, and more.
Each is expertly crafted using evidence based techniques including cognitive behavioural therapy (CBT) and visualisation, to help you rewire, reframe, and experience true transformation.
You can’t manage what you can’t measure. Monk integrates with your wearables, like Whoop, Oura, and many more, so that you can see how cold exposure impacts important health metrics over time, like heart rate, HRV and sleep, all in the Monk dashboard.
Not only can Monk track your quantitative metrics like plunge frequency, time and duration - you can also self report of mental health metrics pre and post plunge.
Track your motivation, focus, happiness, stress and see how cold water therapy impacts your mood.
Your life, your schedule. You can schedule your plunges in advance, and Monk will be at the temperature you want, when you want it. Afternoon triathlon recovery on Wednesdays, and a colder morning wake-up on Thursday? Monk’s got you covered. Plus, you can add it to your calendar for added accountability.
KEY FAQs
Cocoon is 123.5cm (L), 71.5cm (W), 84.5cm (H), designed to fit through standard doorways.
Internally, Cocoon is 60.8cm wide, making it roomy for even the biggest shoulders (wide enough for Anthony Joshua, and it's 2cm wider than Origin, our first product).
The Shiver or Shiver Pro chiller sits beside or behind the tub depending on your layout:
Monk Shiver:
- Size: 41cm x 29cm x 36cm
- Weight: 21kg
- Cooling capacity: 880W (up to 1250W peak)
- Temp: cools down to: 3°C
Monk Shiver Pro:
- Size: 58.5cm x 43.5cm x 53.5cm
- Weight: 43kg
- Cooling capacity: 1450W
- Temp: cools to 3°C, heats to 40°C
We bet you will! Cocoon is engineered for full-body submersion without curling up, and comfortably fits users up to 6’9” (203cm). Equally, more petite users will still feel comfortable.
August 2026 – cool down for peak summer. All pre-orders are fulfilled strictly in order of purchase – first come, first served.
It depends on your chiller:
- Shiver (0.3HP): cold-only, down to 3°C.
- Shiver Pro (1HP): hot and cold, 3°C–40°C, perfect for contrast therapy.
Plunge your stress, bad sleep, and fatigue away in 60 days – or your money back.
Simply plunge every other day for a month (30 days total over a 60 day period); log your sessions in the Monk App and record your pre/post plunge metrics. Then experience the transformation!
If you don’t feel like a new you and notice an improvement to your physical or mental health, we’ll give you a full refund.
We suggest choosing based on how you’ll use Cocoon – both options are excellent, just designed for different rituals.
- Shiver (cold-only): Pure simplicity. A powerful cold-only system that cools Cocoon down to 3°C. Perfect if you love consistent deep-cold plunging. Shiver is not suitable for commercial spaces.
- Hot & Cold (Shiver Pro 1HP): The high-performance option. If you want tighter, faster, and more precise temperature control, Shiver Pro is the clear choice. It delivers full-range performance from 3°C–40°C, quick temperature adjustments, and effortless consistency. Ideal for shared homes, higher-frequency use, and anyone who wants the best possible experience.
- Space & placement: Check your available space. The Shiver Pro is larger and can double as a step or seat – ideal for pre-plunge breathwork.
- Commercial ready: Shiver Pro is For high-traffic or commercial settings, the Pro offers faster performance, higher resilience, and best value per session.
- Budget & future-proofing: Starting with the Shiver gives you a strong cold foundation. If you want to upgrade later, you can.
Your Cocoon tub, chosen Shiver or Shiver Pro chiller, connecting hoses and fittings, insulated lid, and a quick-start guide. Everything you need to plug, fill, and plunge.
Cocoon is built for indoor serenity and outdoor resilience. Its hard-shell body and weatherproof components are suitable for gardens, patios, studios, and home interiors.
Cooling and heating times depend on multiple factors like the ambient temperature, but as a guide:
- Shiver Pro: cools 8-10°C per hour, heats 8–9°C per hour
- Shiver: cools 3-4°C per hour
The Cocoon tub and Monk chillers come with a 2-year warranty. That’s twice the industry standard – when you build something properly, you stand behind it.
Yes. When paired with the Shiver Pro, Cocoon is suitable for boutique studios, wellness spaces, gyms, spas, and clubs with regular daily use. Built for performance, finished for interiors.
Yes, we’ve partnered with Klarna to offer 0% interest finance over 6–36 months, making it easier to bring Cocoon home. T&Cs apply.
Monk exceeded all expectations...and I had temendousky high expectations. All aspects of Monk's design have been beautifully delivered for a truly immersive and peaceful experience. When it comes to form meeting function, Monk has reengineered the art of the possible. Daily cold water plunges have remained delightful. Look no further!
Excellent customer service and amazing product. Couldn't really ask for more. Easy to order. Arrived on time. Love the look and functionality. Aftercare was excellent and the team are a lovely bunch. Loving it!
Amazing product. Truly transformative. I've used Monk 3-4 times a week now for more than 4 months and I love eerything about it from the looks and elegant design to the amazing health benefits it has brough to the entire family. Thank you 🙏
WORD ON THE STREET
BE ONE OF THE FIRST 50.
“The best tools are the ones that become part of your routine without question. Cocoon is built that way.”
- Anthony Joshua
Only 50 units available.
Each comes with a numbered certificate signed by Anthony Joshua.
When this batch sells out, the next production run won’t be available until later in the year.