Inflatable Tubs

TUNDRA's inflatable cold plunges deliver chiller-powered cold therapy without the permanent footprint. Three form factors — Yukon, Lena, and Oasis — available as tub-only or as a complete system bundled with the Borealis™ chiller and heater. Set up in under 15 minutes. Deflate and store flat when not in use.

Yukon — rectangular, our most spacious inflatable. Available in Small, Regular and Large to suit different body sizes and spaces. The everyday workhorse for home cold plunge use.

Lena — barrel-shaped, space-saving, designed for a single daily user. Takes up less floor space than the Yukon with the same cold therapy performance.

Oasis — large-format, built for two people or commercial use. The right choice for gyms, studios, events, and group recovery sessions.

Tub only or complete system? The tub-only option suits customers who already own a Borealis or want to add one separately. The System bundles the tub with the Borealis™ Gen 5 chiller and heater — everything you need to start cold plunging in one package, delivered and set up by TUNDRA.

All models connect to the Borealis via quick-release hoses and maintain temperature through ozone treatment and 20-micron filtration. Read the Cold Plunge Buyer's Guide to compare options.