Icebreaker Sierra Half Zip Shirt - Men's


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Soft, indulgent warmth that is totally addictive, the high-loft Men's Sierra Half Zip Shirt from Icebreaker is designed in brushed merino wool fleece that redefines comfort. Constantly breathing and maintaining the ideal core climate, this plush mid layer pullover gives you another perfect alternative to synthetic fleece. A light weight men's zip top that is quick drying and keeps you naturally cozy, the Sierra Half Zip Shirt features a venting ½ length zip neck collar with interior zipper guard and printed inner collar. Its articulated raglan sleeves, gusseted design, and forward side seams optimize mobility and your ability to roam about the planet. A zippered stash sleeve pocket gives you a place to stash chapstick, topo or keys, while a hem wrapped Icebreaker embroidered logo offers a touch of identity. Decadent, stretchy, mobile, unlike synthetics, the Sierra Half Zip won’t hold odor, and features finishing details that look as fantastic as it feels. Instant luxury, once you've experienced the pure Merino softness of the Men's Sierra Half Zip Shirt you won't go back.


  • Fabric: Realfleece Mid Layer 260 g/m²; merino wool brushed fleece
  • 100% New Zealand plush Merino wool pile
  • Naturally transports moisture away from your skin, dries quickly, and keeps funky odors at bay
  • Flatlock stitching
  • 1/2 zip neck collar
  • Interior zipper guard
  • Printed inner collar
  • Articulated raglan sleeves
  • Gusseted design gives you more freedom of movement
  • Forward side seam
  • Zippered stash sleeve pocket
  • Hem wrap label
  • Icebreaker tonal embroidered logo
  • Machine wash cold and line dry
  • Regular fit

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Review Summary

4.8 out of 5

4 Reviews

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

  • Cost: 1
Quality: 5 / 5
Comfort: 4.7 / 5
Durability: 4.7 / 5
Wicking: 4.5 / 5
Fit: 2.5 / 5

4 Ratings & Reviews

Comfort: 5 / 5
Durability: 5 / 5
Quality: 5 / 5
Wicking: 5 / 5
FitClothes: 3 / 5
55-64 yrs

great winter weather garment
January 23, 2012

This truly is one of the most comfortable, soft wool products I've ever owned. I am a snowboarder and love to fly fish in the winter in Utah, so this is the perfect shirt for me. I ordered an XL because I have wide shoulders and long arms - I was concerned that the body would be cumbersome, but instead find the fit perfect for me (I am 5'11", 190lbs).

Pros: Great design, Build quality, Ease of use
Comfort: 5 / 5
Durability: 5 / 5
Quality: 5 / 5
Wicking: 5 / 5

Great pullover
April 10, 2012

As with all Icebreaker pieces, this one is well made, stylish and very comfortable. Icebreaker's Real Fleece line of clothing has more loft than their normal merino line of similar weight. So at 260 g/m2 this feels warmer and more substantial than a regular 260 g/m2 weight piece. The fit runs true to size, and is relaxed, and is suitable for indoor wear or as an outer layer in cool conditions.

Pros: Great design, Build quality, Performance, Cons: Cost
Comfort: 4 / 5
Durability: 4 / 5
Quality: 5 / 5
Wicking: 4 / 5
FitClothes: 2 / 5
from NH
55-64 yrs

A Good Addition
January 22, 2012

I am the ultimate fan of Merino Wool so purchasing this item was a an easy call. I was not familiar with the Ice Breaker brand but am very impressed with the quality of the item. The feel, look, comfort and warmth is terrific as advertised - jury is out on durability since I haven't had the shirt long enough. Now the big question, is it a shirt or a sweater? either way it is a great mid-layer item and I'm very glad it's in my closet. I will look for Ice Breaker items going forward. I will say it fits a little small so I'm glad I bought the XL. I am right on the boarder between L/XL and this item in a Lg would never have fit me.

Pros: Great design, Build quality, Performance, Ease of use
Comfort: 5 / 5
Durability: 5 / 5
Quality: 5 / 5
from Philadelphia suburbs
55-64 yrs

Great Mid-Layer
February 14, 2012

I used this as a mid layer on a recent climb of Mt. Washington. It turns out it was my outer layer almost to the summit. This was so warm I had to take off my shell. I would put on my shell for rest breaks. It is very breathable and moisture wicking. I cannot believe how this performed. I would buy another but that won't be for awhile. This is a very durable layer. I am 6'3" tall and 210 lbs. I ordered an XXL so I could wear it over a layer and to allow for shrinkage just in case. I love the fit. It is very comfortable. You get what you pay for and this purchase was well worth it!

Pros: Build quality, Performance, Great value

Also Available

Icebreaker Men's Sierra Half Zip Shirt Photo

Black, Black/ Monsoon, Cobalt/ Admiral, Mars/ Monsoon, Nova/ Canal, Oak/ Spruce 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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