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Arc'teryx RHO LT Zip Review

Top Pick Award

Long Underwear - Men's

  • Currently 4.2/5
Overall avg rating 4.2 of 5 based on 2 reviews. Most recent review: April 19, 2013
Street Price:   Varies from $103 - $119 | Compare prices at 5 resellers
Pros:  Excellent quality stitching and material, excellent breathability, fit is long enough and lean enough, super cozy and soft material, good temp. regulation – fast drying, doesn’t shrink or pill in wash
Cons:  Zip mock neck makes it more limited with layering, too heavy for highly aerobic activity, expensive
Best Uses:  Camping, climbing, bouldering, hiking, skiing, winter sports, walking Pre/Post exercise, backpacking, horseback riding
User Rating:     
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 (5.0 of 5) based on 1 reviews
Manufacturer:   Arc'Teryx
Review by: Chris McNamara ⋅ Founder and Editor-in-Chief, OutdoorGearLab ⋅ June 22, 2011  
The Arc'teryx RHO LT Zip superior fit and excellent breathability put it at the top of its class of high performance long underwear. Due to the price tag, if you can only buy one base layer, I would probably recommend another one such as the Smartwool Midweight Crew or Patagonia Capilene 3 Crew – both less expensive and completely versatile. BUT, if you can get even so much as two, the Arc'teryx needs to be one of them. With excellent craftsmanship and stylish design, this is a top for everyday – whether or not you are being active outdoors. It is functional, comfortable, and tough while still being cozy enough to sleep in. With other great base layer tops, one of these factors can often be sacrificed at the expense of the other, but not so with the Arteryx.

Check out our complete Men's Long Underwear Review to see how this performed against the competition.

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OutdoorGearLab Editors' Hands-on Review

While the RHO LT Zip was the most expensive of the base layers we tested, the top looked and performed at the top of its class.

I have a longer torso, very long arms, and broad shoulders, which means that often times, base layers are either too short in the torso, the sleeves, or both. For activities with extensive stretching, twisting, bending, etc. (i.e. almost everything!) this becomes a major problem. I was so excited, than, the first time I put on the RHO LT Zip and found it to be snug and sleek, without pulling or riding up around the waist. And Hallelujah! Arms that are long enough! The true test would be washing the top, and when washed, the material held up without pilling or twisting, and there was virtually no shrinkage. Over time, the RHO has kept its fit and proved to be highly durable while maintaining softness.

One morning, I selected this base layer for a brisk, uphill hike in cooler, drizzly conditions – the conundrum of a situation when you are both hot and cold simultaneously. The top performed beautifully! Excellent breathability meant that it was practically dry when I reached the top, and didn’t make me cold on the way back down. It was thick enough to keep out the drizzle, but the arms were easy to push up and the zip neck allowed me to cool off when needed. I used the zip pocket on the upper arm to hold my keys, and it was tight enough to keep them from sagging or jingling, but not so fitted that I felt them digging into my arm. It is attention to details like this that make a base layer great.

Afterward, I kept the top on for a while and it was super comfortable, rather than stinky or soggy. Like the Under Armour Base 2.0, this is a base layer that can be worn long after your exercise stops. While a bit heavier and slower to dry than the Base 2.0, it is far warmer.

I only have two real complaints about this baselayer, and even still they do not outweigh the positives. For one thing, while it is a top for all occasions, it is not the most versatile when it comes to layering. The zipper at the neck, and the mock neck itself, might discourage you from wearing it under other tops (excepting your outermost jacket). This is added to by the fact that the whole idea of a pocket on the sleeve is so that it is readily accessible. However, the top is also so fitted that I was uncomfortable wearing anything other than a sports bra or the thinnest tank under it.

Secondly is the price tag. Simply put, $109 is not a small sum to drop on any piece of clothing. While it was definitely one of the best base layers we tested, there are others that performed as well, or close to it, for far less of a cost.

Best Application
Use this baselayer for all your athletic endeavors, excepting the highest end aerobic activities or warm weather sports. The fitted design and super stretchy fabric makes it ideal as far as freedom of movement goes. The seams are strong, and the fabric can hold its own against the outdoors and the washing machine. This top is good for skiing and winter sports, running, horseback riding, camping, climbing, backpacking, and hiking, just to name a few.

Other Versions
For an extra $10 you can buy Arc'teryx RHO LTW which is the same top but made of MAPP Merino Wool. There is also a women's version called the Arc'teryx RHO LT Zip - Womens.

Chris McNamara and Emily Zell

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OutdoorGearLab Member Reviews

Most recent review: April 19, 2013
Summary of All Ratings

OutdoorGearLab Editors' Rating:   
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Average Customer Rating:   
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100% of 1 reviewers recommend it
Rating Distribution
2 Total Ratings
5 star: 50%  (1)
4 star: 50%  (1)
3 star: 0%  (0)
2 star: 0%  (0)
1 star: 0%  (0)
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   Apr 19, 2013 - 12:22pm
rexthegorman · Backpacker · Memphis, TN
I have the RHO LTW, which is the same thing, but merino instead of synthetic. I meant to order the synthetic version, but I guess I fat fingered it. I'm really glad I did.

This base layer is fantastic. It's become a staple in all of my adventuring, replacing my Patagonia Capilene 3. The wool is great at providing some warmth while wicking moisture away so that you don't overheat.

The Capilene was great, but it didn't breathe quite as well. Also, after a few days in the backcountry It smelled like a Taun-Taun (on the inside). Not much worse than smelling something bad and realizing that it's you.

The fit is spot on (as is the case for most Arc'teryx Products). In colder conditions, this goes right next to my skin and under an insulating layer. In milder conditions, I usually wear a silk-weight layer underneath so that I can shed it if necessary. I haven't found the zipper to cause any problems with layering yet.

When this one wears out, I'll most likely order another one (on purpose this time). The price is steep, but you definitely get what you pay for.

Bottom Line: Yes, I would recommend this product to a friend.
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The Arc'teryx RHO LT long underwear top with zip-neck makes an outstanding base layer that comes in your choice of synthetic or wool.
Credit: arcteryx.com
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Seller Price
Backcountry $103.16  -  6% off!
Amazon $118.90
MooseJaw $118.95
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