100% undyed wool, washed with water only, dense felt, room for long hair, and a brim you can fold: what to look for in a sauna hat.

Your pores are fully open in the sauna. What your hat is made of matters more than most brands want you to know. A maker with 15 years of hand-felting explains why undyed wool is the only material that makes sense — for infrared sauna, contrast therapy, and cold plunge.

Non-toxic wool sauna hats and slippers made from undyed, water-washed wool. A plastic-free choice for calm sauna, hot plunge, and cold plunge rituals, designed for skin comfort and everyday rest.

Why do sauna lovers wear wool hats? I explain how a dense wool sauna hat keeps heat off your head and hair, so you can stay in longer, in comfort. Plus how to choose a good one and how to wear it.