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Climb through the cold with the help of the Tweak Cap.

As Mammut’s best-selling beanie, you’ll find the Tweak Cap warming heads from the frozen icefalls of Ouray to the boulders of Switzerland. Made with a soft wool-acrylic blend, the Tweak is a versatile insulator for any cold day of climbing.

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Here's what others have to say...


Great fit

  • Familiarity:I've used it once or twice and have initial impressions
  • Fit:True to size

Ditto on the sizing comments below. My head is probably on the bigger side and the fit of this beanie means my head stays warm without feeling constricted on top. A very warm beanie and with awesome styling too.



  • Familiarity:I've put it through the wringer
  • Fit:True to size

Love the hat! Sizing is just right so it isn't squeezing my head, but not huge so I don't loose it when the wind blows. My head is pretty average in size. The thickness at the bottom and lighter material at the tope make it great for a day out as it allows the noggin to breath a little better. Only complaint is the stitching at the sides halfway up makes it look like the hat has ears. Still no biggie.


my favorite beanie

  • Familiarity:I've put it through the wringer
  • Fit:True to size

very comfortable! heavier area on the bottom that keeps my ears nice and toasty. thin enough up top to fit under a helmet.


Very happy

  • Gender:Female
  • Familiarity:I've put it through the wringer

Wanted this hat for some time and decided it would be my Christmas gift to myself! Design, construction, comfort and warmth all great. Lined at the "brim" with fleece to keep your ears toasty. Having 4 sons, it's hard for me to wear it because they take it!! Ordering and shipping from Backcountry was easy and quick.


Warm with concerns

  • Gender:Male
  • Familiarity:I've used it several times

I really like this hat as it is very warm, has a nice soft heavier area around the bottom to keep your forehead and ears nice and toasty. My only concern is that the outer fabric has a tendency to pill around where my goggles go around. Not the end of the world by any means but just something to note in-case Mammut is reading these reviews. Otherwise a great, warm hat for the dough!

I learned the hard way that Mammut doesn't listen, care or sew well.