Twenty minutes in the morning before the day starts. Steam still coming off the water when I get out, which tells me everything I need to know about the insulation.— Owen H.
Trusted by pro athletes from:
Set it up on the terrace last spring and it hasn't moved since. Quick to fill, easy to drain, and it actually looks like it belongs out here.— Ines L.
Started using it after morning runs and now I can't skip it. The terrace setup makes the whole thing feel like part of the routine, not a chore.— Daniele V.
#1 best selling German-Engineered cold plunge
Zennest Pro Oval 140
Boost mood & energy, reduce anxiety, sharpen focus, speed muscle recovery, and sleep deeper with cold therapy.
- Patented Air-Cavity insulation with sub-zero tech
- Oval shape for full leg extension
- Fits users up to 6'7" comfortably
- Free Shipping
- 1-Year Warranty
- 30-Day Returns
- USA Support
Choose your tub
Order now, ships today.
Free delivery within
—
Order now, ships today.
Free delivery within —
Free Shipping
1-Year Warranty
30-Day Returns
USA Support
❄Pro vs Standard
Standard: Six-layer insulated wall, fits up to 6'2", great for beginners.
Pro: Patented Air-Cavity construction, 10% thicker thermal stack, fits up to 6'7", reinforced rim load tested to 176 lb, dual chiller ports.
↔Dimensions
Capacity 140 gal • Length 70 in • Width 33 in • Height 30 in • Empty weight 14 lb • Fits users up to 6'7" / 350 lb • Dual chiller ports
♥Cold Therapy Benefits
- Soothe muscle soreness and inflammation
- Boost & support immune system
- Improve blood circulation
- Better quality sleep
- Boost energy levels
- Improve mood and mental health
- Reduce chronic pain
⊞Shipping & Returns
Shipping: Free US shipping on orders $100+. Tracking sent within 1–3 business days.
Returns: 30-day money-back guarantee for unused condition.
TRUSTED BY PRO ATHLETES FROM:
WHAT OUR CUSTOMERS SAY
★★★★★
Twenty minutes in the morning before the day starts. Steam still coming off the water when I get out, which tells me everything I need to know about the insulation.— Owen H.
★★★★★
Set it up on the terrace last spring and it hasn't moved since. Quick to fill, easy to drain, and it actually looks like it belongs out here.— Ines L.
★★★★★
Started using it after morning runs and now I can't skip it. The terrace setup makes the whole thing feel like part of the routine, not a chore— Daniele V.
AS SEEN IN
Us vs Them
Zennest
- 6-layer insulation + patented Air-Cavity Thermal Shield (Pro)
- High-strength UV-resistant outer shell
- Fits users up to 6'7" comfortably
- Free from BPA, phthalates & harmful chemicals
- Ships from the USA, fast delivery
- Covered by warranty + 30-day returns
- Reinforced rim load tested to 176 lb (Pro)
- Dual chiller ports (Pro) for precise temperature
Knockoffs
- Very little or no insulation
- Poor quality material that deteriorates after a few uses
- Small size, can't fit comfortably
- Cheap plastics containing BPA & phthalates
- Ships from China, long delivery times
- No warranty coverage or support
- Flimsy rim that collapses under load
- Not chiller compatible
Here's the data
Based on a study of 9,434 people
98%
Felt cold plunging had a positive impact on their health
92%
Thought cold plunging made them feel happier
82%
Started to notice benefits within 2 weeks
94%
Believed Zennest products are great value
Our thriving community
Lena H.Mornings on the porch with this have replaced my coffee routine. The view, the cold, and ten minutes of quiet — that's the whole thing for me.
Tomás R.Finishes every workout properly. My wife got into it too after watching me use it for a month. Sits in the garage next to the rack and doesn't look out of place.
Ben K.The ice stays ice. I used to top it up halfway through — with this one I don't have to. Whatever they're doing with the insulation is working.
Noor A.Lives on my balcony. Neighbors have asked where I got it more than once. Easy to drain, easy to refill, and it actually looks good up there.
The benefits of cold therapy
Cold immersion is one of the most powerful things you can do for your mental and physical health.
💪
Performance / Recovery
Soothe muscle soreness and inflammation so you recover faster between sessions.
😴
Better Sleep
Calms the nervous system and reduces stress hormones for deeper sleep.
⚡
Elevated Energy
Activates the body's natural recovery processes for jitter-free energy.
😊
Boosted Mood
Raises baseline dopamine levels for elevated mood that lasts hours.
🛡️
Immune Support
Strengthens immune response and helps fight off illness.
🧘
Stress Relief
Decreases the stress hormone cortisol and improves emotional regulation.
🔥
Weight Loss Support
Activates brown fat tissue to help burn calories and support metabolism.
🩹
Pain Relief
Constricts blood vessels to decrease swelling and chronic pain.
100% RISK-FREE PROMISE
Try it. Love it. Or send it back.
We're so confident you'll love your Zennest Pro Oval 140 that every order is backed by a 1-year manufacturer warranty and a 30-day satisfaction guarantee. If you're not 100% satisfied for any reason, we'll make it right.
Free US ShippingOn orders over $100
1-Year WarrantyManufacturer guarantee
30-Day ReturnsFull refund, unused condition
USA SupportReal humans, fast replies
Returns must be in unused condition. See our refund policy for full details.
Frequently asked questions
Will I fit if I'm 6'3" or taller?
Yes. The Pro Cylinder fits users up to 6'4". For full leg extension, our Oval models accommodate users up to 6'7".
How much ice do I need to add?
Most users add 15–40 lb of ice per session depending on tap-water temperature. With Air-Cavity insulation, the water stays cold for multiple sessions.
How long does the water stay cold?
Up to 24 hours on the Standard and multiple days on the Pro, depending on ambient temperature.
How do I keep the water clean?
For long-duration use, pair with a Water Maintenance Pack. Without sanitizer, change water every 3–5 sessions or once weekly.
Can the tub be used outdoors?
Yes — the shell is UV-resistant. In freezing temperatures, stir the water once a day to prevent it freezing solid.
Is the Pro chiller-ready?
Yes. Pro models include dual quick-connect ports compatible with most ice bath chillers — no adapters needed.