About Koriboshi

We’re sauna enthusiasts who began our journey over five years ago in climbing gym saunas. What started as post-climb relaxation quickly became a daily ritual — but we kept facing one annoying problem: our hair was getting fried in the heat and our heads was suffering from overheating.

That’s when we discovered sauna hats. Unfortunately, none felt quite right — they were rough, hard to wash, or just plain uncomfortable. During a visit to Asia, we noticed something different: people wearing towels to protect their heads. Later in Japan, we found beautifully made cotton sauna hats inspired by the same idea.

This inspired us to create Koriboshi —
Kori = Ice
Boshi = Hat

Our Japanese-style cotton sauna hats are soft, breathable, easy to wash, and designed to make your sauna sessions even better. Born out of love for sauna culture, made for everyday use.