Kooru Handcrafted Redwood Cold Plunge Tub — Shou Sugi Ban | Sienna Wellness Co.

Kooru Cold Plunge Tub — Handcrafted Redwood

$12,999.00

Color Natural Oiled Leather Spanish Oak Dark Natural Teak

The Cold Plunge You’ll Never Want to Leave — Handcrafted in San Diego

The Kooru Cold Plunge Tub is not a mass-produced wellness product. It’s a hand-selected, hand-fired, hand-finished work of functional art — built from sustainably sourced California redwood using the ancient Japanese technique of Shou Sugi Ban, and crafted by artisans in San Diego who take pride in every board they touch.

Cold water therapy has never looked — or felt — this good.

Why Kooru Stands Apart

Shou Sugi Ban Craftsmanship — Each board is hand-selected, carefully fired, and sanded in the centuries-old Japanese tradition. The result is an unmatched depth of color, exposed grain, and enhanced durability that only improves with age
Sustainable Redwood Construction — Ethically sourced, naturally resistant, and built to last outdoors or indoors for years
Natural Ozone Purification System — No harsh chemicals. Ozone (O3) is the most effective, sustainable water treatment method available — breaking down contaminants without harmful byproducts
Adjustable Temperature Control — Programmable chiller keeps your water at your ideal cold therapy temperature, ready when you are
Plug-in Ready — Standard 110V outlet, no special wiring required. Just 350–500W of power usage
5 Handcrafted Finishes — Choose from Natural, Oiled Leather, Spanish Oak, Dark Natural, or Teak to match your space perfectly

The Science of Cold

Cold water immersion is one of the most powerful recovery tools available — reducing inflammation, accelerating muscle recovery, boosting mood through norepinephrine release, and building mental resilience through hormetic stress. Pair it with your sauna for the ultimate hot/cold contrast therapy protocol.