Luxury Spas / Sierra Spas
Cold Plunge Pro XL
$5990Cheaper
Released 2023
Best Cold Plunge Tubs · head-to-head
Cold Plunge Pro XL vs Cold Stoic 2.0
A sourced, side-by-side comparison. Cold Plunge Pro XL is cheaper at $5990. Every spec and price links to its source.
Renu Therapy
Cold Stoic 2.0
$9499
Released 2023
Which is better: the Cold Plunge Pro XL or Cold Stoic 2.0?
On the specs we track, they're closely matched. The Cold Plunge Pro XL is the cheaper at $5990.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Cold Plunge Pro XL | Cold Stoic 2.0 |
|---|---|---|
| US price | $5990 | $9499 |
| Brand | Luxury Spas / Sierra Spas | Renu Therapy |
| Released | 2023 | 2023 |
| Msrp usd | 5990 | 9499 |
| Water capacity gal | 160 | 95 |
| Includes chiller | Yes | Yes |
| Min temp f | 37 | 39 |
| Chiller power hp | 1 | 0.25 |
| Interior length (in) | 70 | 40 |
| Interior depth (in) | 23 | 31 |
| Filtration | Yes | Yes |
| Wi-Fi app control | Yes | No |
| Tub material | acrylic | acrylic |
| Insulated | Yes | Yes |
| Weight (lb) | — | 365 |
Sources — Cold Plunge Pro XL: sierraspa.com (verified 2026-06-23). Cold Stoic 2.0: renutherapy.com (verified 2026-06-23).
What's the difference between the Cold Plunge Pro XL and Cold Stoic 2.0?
Where the two actually differ on the specs we track (7 of 12). Matching specs are omitted.
- Msrp usd: Cold Plunge Pro XL 5990 vs Cold Stoic 2.0 9499
- Water capacity gal: Cold Plunge Pro XL 160 vs Cold Stoic 2.0 95
- Min temp f: Cold Plunge Pro XL 37 vs Cold Stoic 2.0 39
- Chiller power hp: Cold Plunge Pro XL 1 vs Cold Stoic 2.0 0.25
- Interior length (in): Cold Plunge Pro XL 70 vs Cold Stoic 2.0 40
- Interior depth (in): Cold Plunge Pro XL 23 vs Cold Stoic 2.0 31
- Wi-Fi app control: Cold Plunge Pro XL true vs Cold Stoic 2.0 false
What reviewers say
Sourced tester consensus for each — the "what people who used it think" layer, not just specs.
Cold Plunge Pro XL
No sourced tester review yet.
Cold Stoic 2.0
One whitelisted hands-on tester body verified: BarBend, which tested the Renu Cold Stoic 2.0 in its own facility. Verdict: a beautifully built, exceptionally clean, well-insulated luxury tub whose integrated chiller cools painfully slowly and whose near-$10,000 starting price is hard to justify (2.5/5 for value, 1/5 for portability). (1 sourced review, 1 lab-tested.)
Praised: Three-stage filtration plus ozone generator keeps water clean with minimal effort; Thick insulation holds cold temperature for hours after the chiller is turned off; Quiet integrated chiller and premium, customizable build with dedicated drain port.
Flagged: Chiller is very slow to cool: 40-60 min per degree, 12-24 hours to reach target; Near-$10,000 starting price is $3,000-$4,000 more than comparable tubs (2.5/5 value); Extremely heavy and non-portable (345 lb empty), manual-only with no WiFi/remote.