Modern Reform Kooru Handcrafted Redwood Cold Plunge Tub

The Kooru Cold Plunge Tub is a handcrafted immersion tub built for those who appreciate natural materials, thoughtful design, and traditional craftsmanship. Each tub is carefully constructed in San Diego using sustainably sourced redwood and finished using the centuries-old Japanese wood-preserving technique known as Shou Sugi Ban.

This process lightly chars the wood’s surface, enhancing durability while bringing out the deep grain and rich contrast that make each tub unique. The result is a visually striking cold plunge tub that blends traditional craftsmanship with modern cooling and sanitation technology.

Designed for simple setup and everyday use, the Kooru tub operates on a standard 110-volt outlet and includes a temperature-controlled chiller system and ozone sanitation to help maintain clean water.

Every tub is individually crafted and finished by hand, giving each piece subtle variations that highlight the character of the wood and the care that goes into its construction.

Features

• Handcrafted Redwood Construction
  Built in San Diego using carefully selected, sustainably sourced redwood boards.
• Traditional Shou Sugi Ban Finish
  A Japanese wood preservation technique that chars the surface of the wood to enhance durability while highlighting the natural grain and depth of color.
• Temperature-Controlled Chiller System
  The included programmable chiller helps maintain consistent water temperatures for cold immersion sessions.
• Ozone Water Sanitation
  An integrated ozonation system helps maintain cleaner water by oxidizing organic contaminants and microorganisms.
• Simple Home Operation
  Designed to run on a standard 110V outlet with straightforward maintenance and servicing.
• Custom Artisan Craftsmanship
  Each tub is individually handcrafted, resulting in subtle variations that make every piece unique.

Specifications

• Overall Dimensions
  Approximately 64" L × 34" W × 35" H
  (Dimensions may vary slightly due to the handcrafted construction.)
• Clearance Requirement
  Minimum doorway or passage width: 33"
• Weight
  Approximately 400 lbs
• Water Capacity
  Approximately 60 gallons
• Tub Interior Dimensions
  36" L × 24" W × 30" H
• Chiller
  1/4 HP cooling unit
• Pump Flow Rate
  950 GPH
• Water Sanitation
  Ozone (O₃) ozonation system
• Power Requirements
  Typical usage: 350–500 watts
  3–5 amps on a standard 110V outlet
  GFCI outlet recommended where required by local code
• Filter Maintenance
  Filter replacement approximately every 1–2 months depending on usage
• Production Time
  Approximately 2 weeks

This product is intended for general wellness use and is not intended to diagnose, treat, cure, or prevent any disease. Please read our Terms of Service for more information.