Therasage Files Trademark for Therafrost, Targeting Cold Plunge Bathtub Market

The wellness hardware company behind the Therasage infrared sauna line is planting a flag in cold therapy. THERASAGE, LLC filed a U.S. trademark application for the mark THERAFROST on March 12, 2026, with the filing logged under serial number 99699597 in the public record. The application covers International Class 011, the goods classification that includes heating, cooling, and bath equipment, and explicitly names "cold plunge bathtubs" among its listed products.

The move signals that Therasage is positioning to extend its brand from heat-based recovery into cold immersion, a segment that has exploded in mainstream wellness culture over the past several years. Therasage has built its reputation largely around full-spectrum infrared saunas, so a cold plunge line would represent a significant product category expansion and put the company in direct competition with established players already crowding the at-home cold plunge space.

What makes the THERAFROST filing notable is its specificity. Trademark applications covering broad wellness equipment sometimes leave product descriptions deliberately vague, but listing "cold plunge bathtubs" outright indicates Therasage is moving with concrete intent rather than simply reserving a name for future optionality. Class 011 also leaves room for temperature-controlled hardware more broadly, which could encompass a range of recovery equipment beyond a single tub product.

The application was initialized in the public record within days of filing, putting competitors and distributors on notice. For anyone tracking where legacy sauna brands are headed next, THERAFROST is now on the radar.