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  • Icebreaker - Sierra Fleece Jacket - Men's - Black/Black
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  • Icebreaker - Sierra Fleece Jacket - Men's - Black/Black

Icebreaker Sierra Fleece Jacket - Men's

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    • Black/Black

    3 Reviews


    A midweight fleece for winter layering or fall hiking.

    The Men's Sierra Fleece Jacket from Icebreaker can be worn as a layering piece when you're out skiing or as a stand-alone jacket on a brisk fall hike. The merino wool is naturally antimicrobial, so even after a hard day of skiing, you can still smell fresh at the bar ... well, as fresh as usual. Zippered hand pockets provide room for snacks, and a zippered chest pocket has a media port for your cord so you can jam out to your favorite tunes to kill the time on the chairlift.

    • Merino wool, nylon, and Lycra
    • Antimicrobial
    • Regular fit
    • Zippered hand pockets
    • Zippered chest pocket with media port
    • Item #ICE004Z

    Tech Specs

    86% merino wool, 10% nylon, 4% Lycra
    Fleece Weight
    200 g/m² midweight
    2 zippered hand, 1 zippered chest with media port
    Recommended Use
    hiking & camping, skiing & snowboarding, casual
    Manufacturer Warranty
    limited lifetime

    Tech Specs

    • Reviews
    • Q & A

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    My favorite fleece of all time

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

    Nice relaxed fit, easily layers over baselayers, but can be worn under a down vest or vest & rain jacket.

    Chest pocket is nice size, it also has a reinforced hole to run your ear buds cord to your phone. 2 exterior hand warmer pockets are extra large and have long zippers and they open top down so when wearing a pack with a hip belt you can still zip the pockets down enough to get your hands inside. 2 interior pockets are open at the top and can hold misc items.

    Main zipper pull is on the left side, which is unlike most American zippers. All zipper pulls have extensions so you can easily grab them with cold hands or gloved hands.

    Wore this every day on a hike across England and wouldn't hike in cool weather without it. Climbed Pilot Mountain in NC on a day that started cold and finished warm and this still worked great. I also have fleeces from Mammut, Arc'terryx and First Ascent and this is, by far, my favorite fleece.

    Wool is lightly reinforced with a bit of Nylon and Spandex and very durable.

    The interior of the collar is very soft and plush against your skin, incredibly comfortable!

    Good Cool Day Outer/Cold Day Mid Layer

    • Familiarity: I've used it several times
    • Fit: True to size

    I have two mid-layers right now: Arc'teryx's Atom LT for possibly wet 0 to 20 degree days and Cerium LT for the dry -20 to 10 days. This left a large gap in the warmer sector of my mid layer quiver so I decided to give the Sierra LS from Icebreaker a shot and was pleasantly impressed.

    First off, the other two mid layers I mentioned above do great with warmth/weight ratio, but sometimes they are a bit too warm on those days where it's close to freezing temps and the activity level is high. The 260 weight merino gives pretty good warmth layered with a shell for the 25-40 degree days and does well on its own between 45-60. I also was happy about how well it breathed as I've put in some grinding skintrack days on this piece and I don't overheat nearly as much. The weave is also very comfortable to the touch on the in and outside of the jacket.

    The zipper pulls and zippers feel strong with good quality of worksmanship to them. The media pocket is nice but be forewarned: the inner pocket lining material is not too stiff on the hand pockets so if you are a person who likes putting a ton of stuff in those pockets, be prepared to have the lower part of the garment sag due to the weight.

    The sizing is mostly good. I'm 5'11" 180 lbs with a med-smallish torso, short arms, wide shoulders and med-smallish waist and the Large was a pretty good fit with a reasonable amount of stretch. The length might end up being a bit on the longish side, but that may be due to my dimensions.

    Overall, a pretty good piece that I'd recommend to anyone looking for a good fall time outer layer or a mild winter time mid layer.

    Icebreaker quality

    • Familiarity: I've used it once or twice and have initial impressions
    • Fit: Runs large

    Same superb Icebreaker quality in the jacket. Note that the fit is kind of loose. Sizing chart indicates a Medium with a Chest width of 38.75". I had expected/ wanted a tighter fit (My Chest width is 41"), but I think I can wear it on top of two more (base) layers with no issues.