Butter Masster Sauna Hat Worn once. Free size, but it was a little small for my large head, so I'm sadly selling it. Home cleaned. Height: 24cm, Head circumference (inner): 68cm Sold out on the official website. No stains or damage. Super cute! Niko and... x Butter Masster collaboration sauna hat. A collaboration item with the cafe "Butter Masster" in Daidabashi, Tokyo. An item with charming, fun characters. Protects hair, which is vulnerable to heat, from damage in the sauna's high temperatures. #saunahat #buttermaster #buttermasster