Icebreaker Sierra Full Zip Shirt - Men's


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What Mother Nature gave New Zealand merino sheep to wear outside is now available to you with the Icebreaker Men's Sierra Full Zip Shirt. This medium weight fleece top uses the natural insulating and moisture-regulating abilities of merino wool to keep you warm and dry. Made from Realfleece 260, this wool top has a smooth jersey exterior and a terry-knit, brushed interior to create air pockets that will conserve body heat. It is permeable to the outside air making it perfect for aerobic activities in cooler weather like a November hike or a weekend ski tour in April. Pull it on over your long johns for extra warmth in the wilderness or wear it over your workout clothes on your way home after a trail run. A full front zipper makes for easy on and off and gives you ventilation options while articulated raglan sleeves offer a wide range of motion. This long sleeve top has 2 zippered hand pockets and a zippered stash pocket on the sleeve. Styled like a modern cardigan sweater with an athletic fit, the Icebreaker Sierra Full Zip Shirt for men will look just as good in town paired with jeans as it does on the trail.


  • Fabric: Realfleece 260; 260gm2 mid layer; made from merino wool
  • Interior zipper guard
  • Articulated raglan sleeves
  • Zippered front hand pockets
  • Zippered stash sleeve pocket
  • Printed inner collar
  • Icebreaker embroidered logo
  • Hem wrap label

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Review Summary

4 out of 5

2 Reviews

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

  • Bad design: 1
Quality: 5 / 5
Durability: 4.5 / 5
Comfort: 4 / 5
Wicking: 4 / 5
Fit: 2 / 5
Water Protection: 1 / 5
Wind Protection: 1 / 5

2 Ratings & Reviews

Comfort: 5 / 5
Durability: 5 / 5
Quality: 5 / 5
WaterProtection: 1 / 5
WindProtection: 1 / 5
from Tiburon, Ca
55-64 yrs

Great shirt
September 02, 2012

The shirt Looks great, Fits great, is Soft, and Warm. Love the full length zipper to help control temp. 6'1" 210 lbs athletic, and it fits me very well. Nothing is better than Merino wool.

Pros: Great design, Build quality, Performance, Great value, love the zipper
Comfort: 3 / 5
Durability: 4 / 5
Quality: 5 / 5
Wicking: 4 / 5
FitClothes: 2 / 5
from Orange County, CA
35-44 yrs

Not a very good fit for me
March 10, 2012

I am 5'8", 155 lbs. with broad shoulders. According to the sizing chart, I should have fit in a medium. I got the medium, and I could barely zip up the jacket all the way past my chest - it was that tight. The lower part of the jacket was just right, though. I exchanged it for the Large - now the chest was great, but I am left with a bulky lower section, and an overall feeling that things do not fit quite right. I am returning this jacket for another Icebreaker model.

Pros: Build quality, Ease of use, Cons: Bad design

Also Available

Icebreaker Men's Sierra Full Zip Shirt Photo

Admiral/ Cobalt, Black, Black/ Black, Cargo, Grass/ Turf, Grove/ Cave, Mars/ Monsoon, Nova/ Canal, Oak/ Spruce, Planet and Sepia/ Cave.

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

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