Mountain Hardwear Effusion Dome Beanie - Men's


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A stretchy AirStream Active® Soft Shell hat, the Men's Effusion Dome Beanie from Mountain Hardwear fits under a helmet or hood. Windproof, water resistant, breathable and lightweight, the Effusion Dome is the perfect companion for cool weather aerobic activities.


  • Material: Dry.Q Active
  • Lining: Velous Micro™ Fleece(100% polyester)
  • Updated: DryQ Active Technology
  • Windproof, breathable,water-resistant, and lightweight
  • Microfleece-lined ear band for extra warmth
  • Durable, stretchy, and soft
  • Snug fit for use under a hood or helmet
  • Weight: 0.9 oz.; 26 g.

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Review Summary

4.7 out of 5

3 Reviews

  • Build quality: 2
  • Great value: 2
  • Performance: 2
  • Ease of use: 1

  • runs small: 1
Comfort: 5 / 5
Durability: 5 / 5
Quality: 5 / 5
Warmth: 4 / 5

3 Ratings & Reviews

Comfort: 5 / 5
Durability: 5 / 5
Quality: 5 / 5
Warmth: 4 / 5

Another great Mountain Hardwear product
December 22, 2012

I bought this hat for my early morning running. I received yesterday, I ran this morning with it on. It did a great job keeping my ears warm. It seems breathable enough. so not too hot. I showed it to my wife and now she wants one for her bike riding. I will also be using this hat under my helmet for my bike riding. I highly recommend!

Pros: Performance, Great value
Quality: 5 / 5
from Baltimore, MD

Nice hat, runs small
February 29, 2012

I have the Effusion Power Jacket and really like the material so I was looking forward to this hat. Unfortunately, it runs too small. My head is squarely in the Regular range but that size hat made me feel like the skin was being peeled from my eyeballs. Although the fabric has some give, it has nothing like the stretch that many beanies have, so you can't count on it conforming to your head. I like the material and the lightweight quality. It's similar to the MH Transition, but the Effusion is a little lighter in weight and the Transition fits more true to size, IMO. If I were to run across the Effusion in a store I'd try on the large, but I don't want to go through the hassle of doing this by mail. As for the look of the hat, the top material is generous enough that, on me at least, it stands up a little rather than fitting snugly to the head. The "look" is obviously a matter of personal preference.

Pros: Build quality, Cons: runs small
Comfort: 5 / 5
Durability: 5 / 5
Quality: 5 / 5
Warmth: 4 / 5
from seattle, wa
35-44 yrs

February 08, 2012

warm my ears while leaving my hair cooler. Exactly what I needed will buy again. Very light and compressible. Fleece around the ear and just shell on top of head. Almost like a bandana with softshell covered tarp

Pros: Great design, Build quality, Performance, Ease of use, Great value

Also Available

Mountain Hardwear Men's Effusion Dome Beanie Photo

Black and Collegiate Navy.

Available sizes, while supplies last, include size reg and size large: reg, l.

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