Handmade
100% Felted Wool
Premium Fit
Washable
Build Your Hat Bundle
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Thickest felt, maximum protection
While cheaper options use thin, synthetic material, Felty uses premium-grade thick felted wool felt that actually insulates.
Your hair doesn't get fried. Your ears don't burn. Your scalp stays protected even at 200°F+.
Naturally dyed, naturally performance-driven
No synthetic dyes. Just plant-based colors that won't fade or off-gas in high heat.
Our wool is naturally moisture-wicking and odor-resistant. Dries fast between sessions.
Feel the difference immediately
Extend your session time by 5-10+ minutes without discomfort
Go hotter without the post-sauna headache
Protect color-treated, curly, or long hair from heat damage
Even out body heating—your torso gets the benefit while your brain stays protected
100% felted wool with naturally dyed colors
Hand wash with cold water and mild detergent. Lay flat or hang by loop to dry
Signature contrast Felty loop and limited edition custom embroidery options
Three main things:
(1) It protects your head and scalp from direct, intense heat (sauna air can reach 205°F+).
(2) It helps regulate your body temperature by keeping your head — which has more blood vessels near the surface than anywhere else — from overheating.
(3) It shields your hair from repeated heat stress, preventing dryness, brittleness, and color fade. The result: longer, more comfortable sessions with less dizziness.
The sauna community generally recommends at least 1.4mm of felted wool for real insulation. Thinner felt (under 1mm) offers minimal protection in high-heat saunas. Felty hats are crafted from 3mm premium felted wool at the right thickness to balance insulation, breathability, and a comfortable fit — not too stiff, not too thin.
A knit beanie can work in a pinch, but felted wool is significantly better. Here's why: knit fabric has open loops that allow heat to pass through easily, and it tends to stretch and deform in the heat. Felted wool is compressed and dense — the fibers are tightly matted together, creating tiny air pockets that act as insulation. It slows heat transfer, holds its shape in humidity, and doesn't droop over your eyes mid-session. The sauna community's consensus on Reddit is consistent: felt > knit every time.
Because Felty hats are made from pre-felted wool, the shrinkage process has already happened during manufacturing. The hat is stable in sauna heat and moisture under normal use. The main shrinkage risk comes from machine washing with agitation or using hot water when hand washing — both of which compact the wool fibers further. Stick to cold water, gentle handling, and air drying, and it'll hold its shape for years.
Store it in a cool, dry, ventilated space. Don't stack heavy items on top of it or stuff it into a tight bag while still damp. To help it hold its shape between uses, you can stuff it loosely with a clean cloth or paper while it dries. Keep it out of direct sunlight, which can fade the color over time.
Fill a basin with cold water, add a small amount of wool-specific detergent (like Woolite), and gently press the hat through the water. Don't rub, wring, or scrub — just gentle compression. Rinse in cold water until the soap is gone. Let it air dry completely in a well-ventilated spot away from direct sunlight or heat sources. Don't put it in the dryer.
Especially yes. High, repeated heat dries out hair shafts, causes split ends, and strips color-treated hair faster.
A felted wool hat creates a thermal barrier that protects your hair the same way sunscreen protects your skin.
Many long-haired sauna regulars call it essential — it lets them sauna frequently without wrecking their hair.
Wool is uniquely suited for extreme heat environments. It naturally regulates temperature, wicking moisture away while still insulating. It's naturally antibacterial and odor-resistant — meaning it stays fresher longer and doesn't need washed after every single use. Cotton absorbs moisture and can feel heavy and wet in the sauna. Synthetics can hold heat uncomfortably and some may off-gas at high temperatures. For serious sauna use, wool is the clear choice.
