SaunaLife S1B 1-Person Black Thermo-Pine Cold/Hot Plunge Tub — 124-Gal Immersion Spa

Dual-Purpose Recovery, Designed for Outdoors

Meet the SaunaLife S1B—a premium, single-bather immersion tub built for both cold plunge and hot soak therapy. The elegant black Thermo-Pine surround elevates any backyard wellness space while delivering rugged, long-term performance. 

Durable Thermo-Pine + Comfort-Molded Insert

Thermo-Pine is engineered for outdoor use and longevity (up to 2× longer than cedar), while the thick, contoured fiberglass liner cradles the body for comfortable submersion. Capacity is a generous ~124 gallons, ideal for full immersion and contrast therapy routines. 

Pre-Assembled & Easy to Place

Arrives fully assembled with matching black Thermo-Pine steps, plus built-in drainage and chiller hookups—so integrating a chiller or heater is straightforward. Exterior size is 41.3" H × 40" Ø; interior 34.4" Ø × 36" deep; filled weight ~1,177 lbs. 

Handcrafted in Northern Europe

Crafted to exacting standards for structural stability, thermal performance, and a refined look that complements modern outdoor spaces. 

Product Specs

Premium Features

• Black Thermo-Pine surround (1.65" thick)—outdoor-ready, low maintenance, high thermal resistance. 

• Ergonomic fiberglass insert—contoured for comfort and full-body submersion. 

• 124-gal capacity—ample volume for cold or hot immersion. 

• Pre-assembled—place it, plumb it, plunge. Includes matching steps. 

• Built-in drain & chiller connections—simple integration for hot/cold systems. 

• Handcrafted in Northern Europe—quality materials and finish. 

Health & Wellness Benefits

• Cold plunge may help reduce inflammation, muscle soreness, and perceived fatigue.

• Hot immersion promotes circulation, relaxation, and joint comfort.

• Contrast therapy (hot ↔ cold) supports recovery, resilience, and mood.

• Stress relief & better sleep—a calming ritual to unwind.
  (General wellness claims; not a substitute for medical advice.)

What’s Included

• Black Thermo-Pine tub surround (pre-assembled) 

• Contoured fiberglass liner 

• Matching Thermo-Pine steps for easy access 

• Built-in drainage and chiller connections 

• Basic installation & care instructions 

Why Buy From Us

✅ Free Shipping Across the USA
✅ Authorized SaunaLife Dealer — full warranty
✅ Seamless customer support & delivery

SaunaLife Shipping Policy

At Sauna Sanctum, we’re proud to offer Free Shipping on all SaunaLife saunas delivered within the 48 contiguous United States.

Your order will include comprehensive freight delivery for your sauna, heater, and any additional accessories purchased together — all carefully packaged and shipped for safe arrival.

• United States (Lower 48 States): ✅ Free Shipping

• Canada: Flat-rate freight shipping — $1,250

• Other Locations: Please contact us directly for a custom shipping quote

Shipping & Delivery Timeline

Shipping times vary depending on the SaunaLife model and current availability:

• Some models are in stock and ship promptly

• Others are custom-built to order

For the most accurate estimate, please contact us and our team will provide a tailored shipping timeline for your chosen sauna.

Freight Delivery Details

All SaunaLife orders are shipped via LTL (Less-Than-Truckload) freight to ensure secure and efficient transport.

Once your order is ready to ship, the carrier will contact you directly to schedule a delivery appointment at your convenience.

Order Refusal Policy

If an order is refused for reasons other than damage or shipping errors, a 20% restocking fee will apply, along with any return shipping costs.

Need Help?

Our customer service team is here to make your delivery smooth and stress-free. Contact us anytime at support@saunasanctum.com

• Installation Guide
• Lifetime Warranty