Go Cold. Live Bold.
Michael Phelps Chilly GOAT Cold Tubs

By Master Spas

Alpine Terrain

The GOAT of cold tubs has arrived. The Alpine Terrain, with its warm teak cabinet and white acrylic shell, will complement any outdoor living space.

Designed for ultimate performance and unparalleled comfort, you can experience the benefits of cold water therapy when you want it. Recover faster, improve your immune system, relieve inflammation, sleep better, and more.

Enjoy clean, clear, cold water on demand thanks to the premium filtration system and energy-efficient chiller.

Start-up water care kit, cover, and filter included.

Financing Options Available

Michael Phelps -

“Being able to start my day in the cold tub allows me to be my best self and gives me the best chance to accomplish my goals — whether that’s in the gym, on the golf course or at home with my family.”

Empowering you to take charge of your recovery and wellness

Are you feeling stuck in your health and fitness journey? Cold water immersion can help you go from discouraged to empowered.

Do you struggle with the following?

  • Post-workout recovery
  • Muscle soreness
  • Inflammation
  • Joint pain
  • Lack of energy throughout the day
  • Poor sleep
  • Stress and anxiety
  • Discipline and confidence

Discover an immersive cold water tub that will keep you coming back for more.

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Recovery and Performance

Reduce soreness and come back stronger

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Improves Energy and Mood

Elevate your energy while lowering stress and anxiety

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Encourages Quality Sleep

A change in body temperature triggers the release of hormones like melatonin

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Clean, clear, cold water — 24/7

No more trips to the store for ice

“Life is about living in the moment. When you are in a cold tub, you are forced out of your comfort zone. You can’t help but be in the present.”

— Michael Phelps

Chilly GOAT Tub Reviews


“I started taking cold showers when I traveled a lot for work as a way to wake me up. But the cold tub offers better immersion than a cold shower. I felt like it doubled the impact of a cold shower.”

Victor F.


Achieving your best has never been easier!

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Start your cold tub journey

Choose your Chilly GOAT Cold Tub model.

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Accept delivery

Fill, plug in, and take a dip.

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Achieve your best

Incorporate the chill tub into your routine and unlock the benefits of cold water therapy.

Redefining cold water therapy with unmatched quality and expertise

Bringing together three decades of spa manufacturing experience and input from 23-time Gold Medalist Michael Phelps, Master Spas is revolutionizing the cold tub experience with Michael Phelps Chilly GOAT Cold Tubs by Master Spas. Master Spas, the world’s largest swim spa manufacturer and largest hot tub manufacturer that makes 100% of its product in the USA, is committed to crafting innovative products that meet the highest production standards so you can live life better. Achieve your potential with Michael Phelps Chilly GOAT Cold Tubs by Master Spas.

Better Business Bureau A+ Accredidation
Master Spas is a Spa Certified Manufacturer
Master Spas is a Better Business Bureau Torch Award for Business Ethics Recipient


Master Spas is an Inspire Award Winner


Master Spas is an Ernst and Young Award Winner

Ernst & Young
of the year

The Association of Pool & Spa Professionals and Indiana Hot Tub Association