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Mercury Headband

Mercury Headband

Super soft, moisture-wicking cold weather coverage, lightweight warmth

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Mercury Headband



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One size fits most

Reversible, lightweight technical headband for cold-weather warmth with excellent breathability and moisture-control. Read more

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Cold weather running comfort
Breathable, moisture-wicking Mercury Knit excels at transferring sweat + heat away from the body for comfort during prolonged efforts

For when the mercury drops
Lightly peached on both sides, Mercury Knit has an exceptionally soft hand feel while providing cozy warmth + thermoregulation without added weight

Won't stretch out
Durable nylon easily stretches with you and retains its shape while resisting odors

Snug + comfy fit
Minimal flat-lying headband with a 20” circumference that stretches to accommodate most sized heads (small~large hat sizes)

Two-sided tonal color combo

Stay seen
Signature reflective logo on front and “watermark” reflectivity on back increases visibility in low light

materials + specs

78% nylon, 22% spandex

Garment made in Vietnam


Mercury fabric is bluesign® certified meaning it is free from harmful chemicals and is fabricated in a way that meets a high environmental standard.

Learn more about our sustainable initiatives here.


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Customer Reviews

Based on 9 reviews
carla W.
Wear it for: Hiking, Cycling
Product Fit: Spot-on
Height: 5'7" to 5'9"
Usual Size: XL
Size Purchased: L
Nice and warm

It does the job and I like the color!

Dylan B.
Wear it for: Running
Product Fit: Runs small
Height: 6'0" to 6'2"
Not for big heads

I've always thought I have a big head, but I've never had an issue with "one size fits most"...Until now. This one is pretty tight on my 24" melon, so I wouldn't recommend it to anyone pushing that number. If I had read the description more closely, I would have seen it has a 20" circumference and fits small-large hat sizes, so nobody to blame but myself.

That being said, the material feels great and the item seems to be of good quality. Exactly what I expected.

Gabrielle D.
Wear it for: Running, Climbing
Product Fit: Runs large
Height: 5'1" to 5'3"
Usual Size: S
Size Purchased: S
Great headband

Great fit, actually keeps ears warm. Perfect for winter runs

Carolyn B.
Wear it for: Running
Product Fit: Spot-on
Height: 5'7" to 5'9"
Usual Size: M
Soft headband!

Love the colors and that it is reversible. Not too tight and very soft. Wearing now in 20-35 Fahrenheit. Keeps my ears warm, but still breathable. Guessing it will work well in warmer weather but, unfortunately, haven’t been able to try that yet!

Lindsey M.
Wear it for: Running
Product Fit: Spot-on
Height: 5'7" to 5'9"
Usual Size: M
Super soft and keeps me warm

I love that this headband fits perfectly over my ears to keep them warm and the material is so soft. And it's reversible to boot! I can even wear my Aftershokz under them too. I don't know how they could be better!

Maeve T.
Wear it for: Running, Hiking
Product Fit: Spot-on
Height: 5'4" to 5'6"
Usual Size: S
Light, warm, and keeps AirPods in place!

Great headband. Love the two colors and the weight - it’s light but surprisingly warm. It’s also the perfect snug-ness - doesn’t budge at all on runs and bonus for keeping my AirPods securely in place!

Benjamin H.
Wear it for: Running, Cycling
Product Fit: Spot-on
Height: 5'7" to 5'9"
Usual Size: L
Good head band, more sizes please

I like this head band a lot. It keeps my ears warm, the material is nice and soft and wicks sweat well. My only issue is very specific to me - "one size fits most" hats don't fit me (my head is too big). So this is a bit tight on me, which leaves a crease in my forehead, and can cause a headache on longer runs. Please please please offer oversized head wear!

Marisa B.
Wear it for: Running
Product Fit: Runs small
Height: 5'7" to 5'9"
Usual Size: M
High quality

Great material and we’ll made. Extremely warm so only use it for really cold weather. Just a bit tight on my head.

Wear it for: Running
Product Fit: Runs small
Height: 6'0" to 6'2"
Usual Size: M
Size Purchased: M
Returned - Too small

I returned the headband because it was too small. It is made of a technical fabric (Janji's Mercury). I bought a pair a joggers with the same material. The joggers are very stretchy and great for running/lifting, however when the material was used for the head band there was almost no stretch. After wearing it around the house for 5 minutes, It was no longer comfortable.