Shak Jersey

# 673 | Women's


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The Ibex Promise
We’re committed to uncompromising craftsmanship and to your satisfaction. If you are unsatisfied for any reason, return your purchase within 60 days with proof of purchase to receive an exchange, repair, or refund. It's our promise.

You might expect the Shak to be a more boisterous piece of Merino wool perfection after kicking off a wool revolution, ushering in sustainable fabric in sport clothing before it was a marketable fad. But there it is, looking subtle and refined. The 21 micron weight begs to be used in an endless collection of activity and wears like iron. Go ahead and buy it, the Shak will stay smooth and unruffled through whatever fuss you make for it.

Tech Specs +

  Fit Guide
Fabric Gram Weight:
Garment Weight:
 14.4 oz
Fiber Content:
Fiber Source:
 New Zealand
Fabric Source:
 New Zealand
Garment Source:
 United States

Wool Type +


We start with the best New Zealand Merino wool to make a range of insulative yet breathable midlayers that outdoor enthusiasts swear by. This exclusive knit is square and dense, creating a rugged yet soft fabric with inherent stretch and long-wearing durability. Our Shak fabric is best used as a midlayer but is soft enough to wear as an expedition-weight baselayer and substantial enough to be used as an outerlayer in some conditions. No matter how you wear it, the performance is unbeatable. Machine washable.

Size & Fit Guide Expand +

How Do I Determine My Size?

We recommend a general body measurement guide to determine your size in Ibex clothing. This sizing chart is not garment specific, but in fact a body measurement chart. Here are some helpful hints when measuring:

Bust/Chest: relax arms at sides, keeping the tape parallel to the floor, measure the fullest part of your bust/chest
Waist: keeping the measuring tape comfortably loose, measure around your natural waistline
Hips: standing with heels together, keep the tape straight and parallel to the floor, measure around the fullest part of hips
Sleeve Length: a 3-point measurement, standing with arms relaxed and slightly bent at sides, measure from the base of the neck to the shoulder and then from the shoulder to the wrist bone, add together measurements
Form-fit: garment designed to fit snug to the body throughout
Semi-fit: garment will be contoured to the body
Regular-fit: garment will not be slim, but also not oversized
Relaxed-fit: garment drapes loosely on body

Still need help determining your size? Call 800.773.9647 or email us at for specific garment measurements.

Customer Photos and VIdeos

Q&A and Reviews

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Why did you choose this?
Ibex Outdoor Clothing Store
Have one in another color and love it - great for casual wear and perfect weight.
Kimberly M on Sep 17, 2015
Have one in another color and love it - great for casual wear and perfect weight.
Kimberly M on Sep 17, 2015
4.7 / 5.0
21 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Best of the Best
This can go from strenuous hike to post-hike drinks in a flash. Looks great, fits great, and it doesn't stretch and lose it's shape. I get many wears out of it between washings. It couldn't be any better.
March 27, 2012
Beyond versatile
This was a gift for a friend who loves to travel. It fit her beautifully. I thought it would be a great piece for layering when traveling. She loves it.

I do think the color, black plum, is *much* darker than appeared on monitor.
January 5, 2011
In addition to plusses above, it keeps you really warm without making you feel like you are in a sweat box.
December 16, 2010
Comfortable and Lovely
I wear Medium in most clothing, including other items by Ibex. The Large is what fits me in the Shak. I wouldn't have known this had I not tried on some Ibex items in a local clothing store before I ordered anything online. I love everything I bought from Ibex. But I wish the sizing were more consistent.
March 1, 2012
Go to winter jersey
This is my second Shak, I've owned a hooded version for about 3 years. My go to winter wear, either as a base layer for a light exercise day or as my main piece if I'm really working hard. Covers down to my hips nicely without being too tight or floppy loose.
March 1, 2012
beautiful piece
Using this top for work and casual wear for a while as it seems "too nice" to work out in for now. Lots of complements so far on how nice it looks. I am inbetween sizes and went up one so I can layer over another shirt without being too tight. Nice lines so even though a little big it drapes nicely.
May 26, 2012
I Love These Sweaters/Jerseys!
This is hard to conceptualize until you see one; they are a knit that you wouldn't really call a sweater but heavier and warmer than any other jersey you've had. I get cold easily so I want these probably ten months out of the year but most would find it comfortable around the house and on errands in the winter and as a only/second layer under a shell for aerobic activities. Make no mistake; these
April 28, 2012
Nothing not to like
I wear this as a general indoors sweater. It is typical Ibex high quality -- well made, comfortable, warm. It could easily be used for outdoor sports, but it looks stylish enough for general wear. I like the fact that it is a simple, plain black and isn't fancied up with any other colors or fabric swatches.
October 23, 2010
Longer and Better
It covers more than the shak or the shak classic. Good for layering with other ibex items. Very snug and warm! Very happy customer.
March 23, 2011
Good-bye Patagonia Hello Ibex
I had purchased a Shak about 8 years ago. I wore it for a few years and for some reason I decided to try synthetic mid-layers. This winter I took the Shak out of the closet and wore it as a med- layer for backcountry skiing. It was incredible! It kept me warm (shell over it/thin baselayer under it), and was extremelly breathable. Unlike the synthetic med-layers (Patagonia etc.), I did not overheat
March 25, 2011

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