Ibex Zepher Zip T-Neck - Men's


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Crafted from New Zealand merino wool, the Ibex Men's Zepher Zip T-Neck serves as an excellent first layer for skiing, mountaineering, boating, or under a sweater when the temperature drops closer to home. An 11 inch zip allows you to vent excess heat, while the 2.5 inch collar traps warmth when the zipper is pulled all the way up. Natural elasticity adds to the Zepher's comfort when stretching, which also lends to the shirt maintaining its like-new shape after extended wear. The Ibex Men's Zepher Zip T-Neck is machine washable for easy care, and the natural antimicrobial properties keep the stink to a minimum, even after successive days of 24 hour wear in the backcountry.


  • Soft, itch-free 18.5 micron New Zealand merino wool, 230 grams per square meter interlock stitch
  • Merino wool has natural antimicrobial, temperature regulation, and stretch properties
  • Semi-fit (slightly looser than form fit)
  • 11 inch zip with locking pull holds the warmth or vents as you heat up
  • Raglan sleeves, flatlocked seams
  • 2.5 inch collar height, 1 inch cuff
  • Machine washable
  • Average weight: 12 oz. (340 g)

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Review Summary

5 out of 5

12 Reviews

  • Performance: 8
  • Build quality: 7
  • Great design: 6
  • Ease of use: 3

  • color selection limited: 1
  • Cost: 1
Wicking: 5 / 5
Quality: 4.9 / 5
Comfort: 4.6 / 5
Durability: 4.5 / 5
Warmth: 3.5 / 5
Fit: 2.4 / 5

12 Ratings & Reviews

There's nothing better
December 12, 2009

Like the other reviewer I got the Zepher after falling in love with my Ibex woolies zip-t. The Zepher line is a mid-weight material and Woolies is light-weight. Both are exceptional. I've owned Patagonia, Smartwool and Icebreaker tops and of all Ibex is most like a nice cotton jersey t-Shirt for being completely itch free. Also the Ibex construction is superior. Garments are assembled with flat, strong seams that make for a great fit. These people know how to make clothes fit the human form. Check out the Ibex Shak Glove liner (here at Altrec) for an example. I think it's only Ibex for me from now on.

Comfort: 4 / 5
Quality: 5 / 5
FitClothes: 2 / 5
from New Hampshire
35-44 yrs

Wear it Everywhere
January 10, 2012

I've been wanting to buy an Ibex shirt for quite some time, but couldn't decide on which one. I finally decided on this one and could not be happier with the decision! This is the perfect weight to wear year round, either as a layer in the winter, or on it's own in warmer weather. I would probably be sized as a medium (5'8", 155 lbs.), however I felt it was a little small in the chest. I didn't want the tight fit, so I went with a large and it's perfect! The length of the medium and large, including the sleeve length seemed fairly similar. The main difference appeared to be in the chest.

Pros: Great design, Build quality, Performance
Comfort: 4 / 5
Quality: 5 / 5
Warmth: 3 / 5

from Covington, Louisiana
45-54 yrs

Excellent winter top for runners
November 24, 2010

I serve as director for a fall/winter marathon training group in southeast Louisiana and I've just recently discovered the virtues of merino wool compared to the synthetic mircofiber fabrics common to high-end running gear. I grew up in the cold midwest, but I'll tell anyone who will listen, the coldest days I've ever felt have been here in the New Orleans area - it's a damp cold that can penetrate to the bone. The Ibex Zepher Zip-T seems to ideal long-sleeve performance top for our climate. The lightweight 18.5 micron merino wool keeps me toasty during early minutes of training, but it doesn't overcook me when I'm up to speed and warmed-up. The deep zipper allows for a little extra ventilation if needed and the fit is an athletic form-fit but not too tight. As with any Ibex piece, the quality is top-notch and it looks like it will withstand the test of time. No itching at all and zero stink, even after a few runs and no washing. I wasn't too jazzed about the color selection and I would love for Ibex to consider one really bright color each season to allow for increased night visibility. I chose the royal blue. Sizing seemed spot on. Highly recommended, great top for runners!

Pros: Great design, Build quality, Performance
Comfort: 5 / 5
Durability: 5 / 5
Quality: 5 / 5
Wicking: 5 / 5
FitClothes: 3 / 5
from Eureka, CA
25-34 yrs

Excellent midweight base layer
March 17, 2012

I spent quite a bit of time researching base layers until I decided to get this top. Aside from style, comfort, and temperature rating, overall garment performance and detailed information about the materials used in making it were very important to me. While other companies had impressive looking offerings, Ibex is the only manufacturer I have found that tells you in detail where their wool comes from, where their fabric is knitted, and where the garment is cut and stitched -- not just what size their fibers are and what gsm weight their fabric has. This top is very nearly top of its class and may even be in a class by itself -- it is the only 100% merino wool midweight top that is completely sourced in New Zealand and is not knitted or otherwise manufactured in Asia (that I know of). This top does not fit skin tight, but it is not intended to. I am 6', 168 lbs and used my measurements to calculate the best size using the Ibex charts. My result was a medium and it fits me perfectly. It is very smooth on skin and absolutely does not itch. The collar grips nicely at the neck, providing good wind protection. It can be worn by itself, although I don't recommend using it for warmth outside of its role as a base layer if you are in significantly cold weather, especially with wind and/or rain. While water does have difficulty penetrating the fabric, it is not waterproof. Wind beyond moderate gusts can pass through and chill your skin. There is a crew neck version of this top, but I chose the zip neck because it is the most versatile across varied temperature ranges and allows for ventilation as needed. I said earlier that it was "nearly" top of it's class, because it does have one minor flaw. This top does not have gusseted underarms, which means the entire top raises when you raise your arms. The length is ample enough to tuck in and remain secure even with your arms fully extended above your head, and the sleeves do hug your forearm area to resist retreating from your wrists, but it is something to consider if this is a critical issue for you (if you wear gloves that only come to your wrist you may experience a gap between the cuff and the glove in this situation). For me, the benefits of the garment make this only a minor pet peeve. Overall, this top is an amazing purchase and I already intend to get more. Ibex is a solid investment that is well worth the money.

Pros: Great design, Build quality, Performance, Ease of use, Great value, will last forever with proper care
Comfort: 4 / 5
Quality: 5 / 5
FitClothes: 2 / 5
Warmth: 4 / 5
from Tennessee
45-54 yrs

Great purchase!
October 15, 2010

This shirt is at home equally on the Mt bike trail or with jeans at a brew pub. I'll be ordering another one for sure!

Pros: Great design, Performance

I'll NEVER go back to synthetics
March 07, 2007

You have to buy a wool garment from IBEX, like the Zepher, as they are the best for warmth, fit and comfort. I am 6'4" and have 35" arms and IBEX has done it right--nice long sleeve length that comes down snugly around your wrists (no loose fit so that cold air rushes up your arms). I bought this shirt two months ago (along with their Woolies Zip-T) and will never go back to synthetic materials for my base/insulation layers again. Warm, itch-free, no odor (I wore it for 9 straight days out West while skiing...don't ask) and it never retained any odor. Warm--holy cow are their garments warm! I just wore it in 9 degree weather and I was toasty all day. I have tried-on the new Patagonia wool base layers and IBEX has them beat hands-down with better fit and quality of workmanship. IBEX is by far the best (can u tell I'm a total convert). I reco also buying their Woolies Zip-T and layering it under this shirt. The Woolies Zip-T is form fitting (although it stretches with you) and...very warm, it hugs your body and you stay toasty. These garments will move perspiration away from your skin just like the polys do. These two garments together cannot be beat by any poly-pro garment on the market today. Like me you'll wonder why you didn't think of buying wool sooner. I will be buying many more IBEX garments in the future.

Comfort: 5 / 5
Durability: 4 / 5
Quality: 5 / 5
Wicking: 5 / 5
FitClothes: 3 / 5
from Fairbanks, Alaska
45-54 yrs

Ibex/Merino never ceases to please...
March 29, 2013

Merino wool is a terrific fiber. Ibex makes great stuff, and the zephyr is great as a base layer for aerobic activity. I skied for 2 hours in 0ºF temps, worked up a sweat, and the Zephyr performed flawlessly, keeping me from feeling clammy and nasty. The mid-chest length zipper helps control your temperature. I didn't stink afterwards too, as merino wool hides body odor. None of that poly-pro stink! The base layer fits smooth and taut, with few wrinkles anywhere. I am long in the torso, and the Zephyr covers me up easily.

Pros: Great design, Build quality, Performance, Ease of use, Cons: Cost

very soft & warm
December 28, 2009

I ordered this for my husband and he found it to be mostly wonderful except it made him itch. So, I took it and I love it...no itch for me and it's very soft and warm.

Comfort: 5 / 5
Quality: 4 / 5

Start with Ibex
January 12, 2011

I have started to diversify my clothes and decided to try this one from Ibex. It is quite good and keeps you warm on those morning excursions. For my body type it is a good fit, not too tight and not too loose. It has a nice strong zipper. Would recommend it again.

Pros: Build quality, Performance

Warm and versatile!
February 19, 2010

As with other Ibex products that both my husband and I own, this is soft, very fine guage and can be used as an under layer, or for more dressier occasions with khakis, etc. Ibex washes well and lasts a long time! I do recommend one size up if you are taller or longer armed.

Comfort: 5 / 5
Quality: 5 / 5
Warmth: 3 / 5
from Marion, IN
35-44 yrs

Soft wool that keeps its shape
January 17, 2011

This shirt is quickly becoming my favorite shirt for fall/winter. I am 5'6" and 150 lbs and the small fits perfect. In this shirt, I am completely comfortable between 55 and 70 degrees. I like the zip-neck, and the fit is "athletic," but not form-fitting. Yes, the shirt is expensive, but I think it's worth it.

Pros: Great design, Build quality, Lasts forever, Performance, Ease of use
Comfort: 5 / 5
Quality: 5 / 5
FitClothes: 2 / 5
Warmth: 4 / 5

from Pensacola, FL
35-44 yrs

Great Base Layer!
January 24, 2011

This is a really comfortable base layer. Fits too small to wear as a pullover out on the town unless you go up a couple if sizes. This is typical Ibex high quality.

Pros: Build quality, Performance

Also Available

Ibex Men's Zepher Zip T-Neck Photo

Alfalfa, Alpine Meadow, Anvil Grey, Ash, Black, Blue Ribbon, Blue Water, Brown Olive, Charred, Deep Lake, Evergreen, Midnight, New Red, Pine, Royal Dark Blue, Salsa, Sea Blue, Stone Grey, Titanium and Tri Red.

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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