The Meaning
of ROSISU
ROSISU combines two Nordic words: ro and sisu.
Ro is calm, stillness, presence, and quiet restoration.
Sisu is strength, endurance, resilience, and steady resolve.
ROSISU was inspired by Nordic sauna traditions and reimagined through a Pacific Northwest lens.
The name reflects the practice of slowing down, and building meaningful wellness habits. It stands for strength, intention, and respect for nature; values woven into every piece we create.
Our Story
ROSISU was born in Seattle, Washington, where founder Mandi embraced the sauna as a way to unplug, recover, and nurture her well-being but wanted a way to protect her hair and stay comfortable longer in the heat.
When she couldn't find a fashionable handcrafted sauna hat made in the United States, she decided to create one herself. She connected with Rebecca, a fashion designer, to create something better.
Together, they combined a shared love of wool, design, and craftsmanship to build sauna gear that is both functional and beautiful.
They chose 100% wool felt for its exceptional performance in high heat and its natural thermoregulating, moisture-wicking, and odor-resistant properties. By partnering with domestic producers and manufacturing within the United States, ROSISU supports small producers, domestic manufacturing, and a more sustainable supply chain.
Rooted in sustainability and slow fashion, ROSISU creates fewer, better products designed to last.
Sauna, Cold Plunge
& PNW Culture
At our core, we believe sauna is more than heat, it's a space to disconnect from technology, reconnect with yourself, and build community.
Rooted in the Pacific Northwest, where sauna and cold plunging are part of a growing culture of recovery and restoration, ROSISU exists to support this evolving approach to wellness.
Our products are designed to keep you comfortable so you can experience each sauna session more fully. We create analog products for analog practices.
ROSISU exists to support a deeper approach to wellness through three pillars:
ROSISU is a woman-owned company built by a small, passionate team:
Mandi Hall, PhD,
Founder, Creative Director
Inspired by the lack of sauna gear in the U.S. for her own sauna sessions, she set out to create a better solution grounded in American-made materials, intentional design, and wellness.
Rebecca Morse, Design & Operations Lead
A slow fashion designer who crafts the look, feel, and function of our products, blending performance with timeless PNW style.
Sarah Russell, Sales & Social Media Lead
Brings the ROSISU story to life by connecting with the growing sauna and wellness community.
Emily Ross, Marketing & Partnerships Lead
Supports ROSISU through marketing initiatives and strategic partnerships.
