Outdoor Research Frostline Hat


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Created specifically for frigid conditions, the Outdoor Research Frostline Hat combines dense Posh Pile™ fleece with a highly water resistant and lightweight 30-denier Pertex® Endurance shell fabric. Unlike other winter caps and hats that give you nothing more than insulation and ear flaps, the Outdoor Research Frostline Hat has a zip-out Thermodynamic™ face mask with a looped polyester interior that won't irritate your skin. Outdoor Research added a zippered pocket inside their Frostline Hat so you can stow the face mask when the thermometer mercury ascends to milder temperatures. The foam brim helps keep your eyes protected from snow and bright sun, although you can snap the brim to the crown of the Frostline Hat when you don't need it--or whenever you remember to bring your sunglasses.


  • Fabric: 100% nylon 30D Pertex® Endurance fabric
  • Lining: 100% polyester Posh Pile™ fleece throughout interior and ear flaps
  • Water resistant and breathable
  • Zip-out Thermodynamic™ fabric face mask stows in internal storage pocket
  • Foam brim snaps to crown when not in use
  • Ear flaps have hook and loop closure
  • Weight: 3 oz, 84 g

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Review Summary

4.7 out of 5

6 Reviews

  • Ease of use: 5
  • Great design: 4
  • Build quality: 3
  • Performance: 2

  • Bad design: 1
  • Cost: 1
  • inferior hook and loop closures: 1
  • they run small!: 1
Comfort: 4.3 / 5
Quality: 4.3 / 5
Durability: 4.2 / 5
Warmth: 4.3 / 5

6 Ratings & Reviews

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

from Wisconsin snow and cold

warmth in the wind
December 13, 2010

The hat works great and in the wind is just right on cold days. The I use for long walks in a windy section of a park near home , seems to work just right with the cold temps.

Pros: Great design, Build quality, Lasts forever, Performance, Ease of use, Cons: Cost
Comfort: 5 / 5
Durability: 5 / 5
Quality: 5 / 5
Warmth: 5 / 5
from Las Vegas, NV
35-44 yrs

super warm hat, nice material
January 19, 2013

using for cycling but need to use my larger helmet to fit it easily. Great layer for super cold days and I'll also use for hiking. Took a size medium as I expected so seems to run true to size.

Comfort: 3 / 5
Durability: 4 / 5
Quality: 4 / 5
Warmth: 4 / 5
from In the hills of Pennsylvania
55-64 yrs

Buy it a size larger!!
January 05, 2013

It was 15 degrees out last night with a steady 20MPH wind when I took our dog for a walk last night. I wanted to give this hat a real test. This hat is well made and much warmer than you would think considering the thickness (it is thin). I am sold. It is thin and light, but windproof and warm. The face mask feature is very well engineered, and works very well considering how thin it is. I have now changed my view of thick = warm. These modern materials have changed the game. The only bad side is that the hat runs small. I bought the XL, as I have a melon for a head, but it is tight. I wish they made a XXL. If they did I would buy two more. I will keep this one even though it is tight. Altrec - can you convince O/R to make a XXL for me?

Pros: Great design, Build quality, Performance, Ease of use, thin and light, Cons: they run small!
Comfort: 5 / 5
Durability: 4 / 5
Quality: 5 / 5
from Washington, DC
25-34 yrs

Perfect for biking
December 03, 2011

I purchased this product for biking in cold winter days/nights, and I am 100% satisfied. The fabric is thin, so that it fits well under my helmet. The fleece inside layer makes it very warm, and the waterproof and windproof outside layer provides protection against rain and snow. The face mask - very easily zipped out - may not provide the warmest protection against biting wind, but allows proper ventilation. It is ideal to wear under a hood.

Pros: Build quality, Ease of use, Cons: Bad design
Comfort: 5 / 5
Durability: 3 / 5
Quality: 3 / 5
from N.E. Mass
35-44 yrs

Very good , overall
July 10, 2011

This hat is comfortable, warm and pretty much waterproof. The features make this the perfect hat to wear for extented use in cold, snowy weather. The face mask is a huge plus. It is easy to access and use. Depending on conditions you can have your face covered or uncovered very quickly. The brim of the hat is great because it has two positions. You can have it down to help protect your eyes and face or have it held up with a hidden magnet that has never failed for me. The only drawback is that the hook and loop closure for the chin flaps just didn't stand up to the task. The flaps were contsantly seperating. I fixed this by attaching a heavier duty hook and loop closure. Now it never seperates. Despite this need to replace the hook and loop on the chin, this hat is great and was the only item I found that had all these features. It is now an importrant part of my winter gear and i would but another one when this one wears out, if it does. I just hope Outdoor Research addresses the hook and loop short coming on this otherwise graet Frsostline hat.

Pros: Great design, Ease of use, very warm, Cons: inferior hook and loop closures
Comfort: 4 / 5
Durability: 4 / 5
Quality: 4 / 5
Warmth: 4 / 5
from minneapolis, mn
35-44 yrs

this hat does it all
January 09, 2011

warm, 'retractable' visor and facemask. very comfortable in every configuration. little concerned about the longevity of the 'alternative to velcro' fasteners and stitching around that area - but all in all a great hat

Pros: Great design, Ease of use, Great value

Also Available

Outdoor Research Frostline Hat Photo

Abyss, Black, Cardinal/ Fossil, Evergreen, Peacock/ Black, Pewter and Retro Red/ Black.

Available sizes, while supplies last, include size medium, size large and size extra large: m, l, xl.

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