Arc'teryx Rho LTW Neck Gaiter


Weight 55 g / 1.9 oz
Materials MAPP Merino Wool, Spandex



Warm, comfortable, and comforting—these are three…

Rating: rated 5 of 5 stars
Source: received it as a sample, freebie, or prize (Trailspace Review of the Month prize package)


Warm, comfortable, and comforting—these are three words I would use to describe the Arc'teryx Rho LTW Neck Gaiter. Combined with a comfy wool beanie, the Rho LTW replaces (sort of) the balaclava normally in my pack.


  • Warm
  • Comfortable
  • Does not itch
  • Doesn't retain nasty odors


  • Pricey
  • How do you pronounce it????

Okay, first off, can someone tell me how to even say Arc'teryx? My best guess is Ark-tur-ex. 

Anyway, I received the Rho LTW Neck Gaiter as part of the prize package for being a Reviewer of the Month in 2016. The gaiter arrived post-winter and sat in a box until October just waiting for me to use it. The wait was well worth it.


I DESPISE being cold, and during the winter I feel I'm always cold. The Rho LTW significantly changes this equation. With it on, cold wind is not running down the back of my neck. 

A friend who trains in cave rescues has explained to me one of the ways to keep a person/victim warm is to keep the carotid arteries—the arteries running through your neck—warm. [In reverse logic, that's why you put a cool towel on the neck of someone suffering heat exhaustion.] In that regard, the Rho LTW delivers well.

20161007_074823.jpgCold morning at Rocky Mountain National Park.


This itch-free merino wool neck gaiter is snug without being constricting. Think of it as a portable turtle neck. I've hiked multiple days comfortably wearing it. 



I've already mentioned how I hate being cold. Pulling on the Rho LTW has a psychological comforting effecting on me—like putting on a pair of jean right out of the dryer, or slipping on a warm pair of clean socks. There is just something "nice" about donning this article of clothing. 

Cousin Eddy would happily wear this neck gaiter!


Quasi Balaclava:

Marathon training in the winter means a lot of cold, pre-dawn runs. A true balaclava doesn't work for me, because you quickly go from cold to hot to cold as my route turns in and out of the wind. The hat goes on, the hat goes off, the hood comes up, the hood goes down. The Rho LTW is a nice piece to quickly cover or vent my face. 


And it doesn't stink after a sweaty run!

The Reviewer of the Month prize package had a lot of great gear. This was one of my two favorite pieces (review coming). I'm so glad I have this neck gaiter! 


Arcteryx should make a dickey and callnit the Eddy...just sayin'...

1 year ago


1 year ago

Thanks for the review, Goose. I'm glad to hear you're enjoying the gaiter. And in case it comes up, say "arc-tare-ix".

1 year ago

Goose, I too am really enjoying mine. I put it to good use this winter.

1 year ago
Jake W


1 year ago

I found mine very constricting...I'm not what you would call overly large or thick necked. Did any of you find this at first? If so I'll have to give it another try...

1 year ago

It's snugger than a turtleneck, but I didn't find it constricting, Phil.

1 year ago

The Arc’teryx Rho LTW neck gaiter is an extremely…

Rating: rated 4.5 of 5 stars
Source: bought it new
Price Paid: $40 Cdn


The Arc’teryx Rho LTW neck gaiter is an extremely long name for a very simple product. Essentially it’s just a tube of fabric (in this case 95% wool and 5% elastane) with unlimited uses. While its primary intended use is around the neck, to keep the cold snow out and the warmth in, I’ve found it handy for many other applications.

I feel like it’s an upgrade on my old synthetic gaiter for a couple reasons—the comfort and quality of the wool, the stretch, it's stink inhibiting, and the thickness. Those reasons helped me grin and bear the price tag, which I feel is the only negative.


  • Warmth-to-weight ratio
  • Versatility
  • Breathability
  • No itch, no stink
  • Temperature regulation
  • Flame resistant
  • Stretchy


  • Price


I’ve found this to be one of the most versatile pieces of gear I own, and one of very few that doesn’t leave my pack year round. When I saw that Trailspace would be including it in the monthly giveaways I felt inclined to write a quick review of how, and why, I choose this gaiter. Although this is certainly not my first gaiter, it will be my last.


Fit and Comfort

I’m a big fan of wool, but a bit of a wimp when it comes to itch factor. Arc’teryx doesn’t list the microns of the wool used and just says it’s a MAPP Merino wool, not sure what the MAPP means. After a little digging this is all I could find for an explanation (borrowed from Arc’teryx’s site):

Eon / Rho LTW / Wool Base Layers

Lightweight and itch-free Superfine Merino wool base layer garments provide warmth and comfort in variable conditions. Merino wool is soft next-to-skin and naturally adjusts its thermal properties in changing atmospheric conditions, maintaining a comfortable equilibrium. The fabric achieves this by absorbing moisture, from cool, damp environments, and releasing a small but perceptible amount of heat through 'heat of sorption', a chemical reaction that occurs when water vapor binds to the chemical structure of the MAPP TECH Merino Wool inner core. This process acts to prevent the chilling of the wearer. Wool is the original 'intelligent' fiber.

To me that’s just a fancy description of the properties of merino wool. Basically that it has a hollow inner core that can absorb water (sweat) to keep the user dry and help regulate your temperature, but theirs sounds way more marketable, I digress.

The wool used is very soft and my best guess would be that it’s somewhere in the 18.5 micron range. I’m basing that solely off feel and comparing it to other wool products I use (Smartwool socks, shirt, hoody, Ibex toques and Woolpower socks, shirt and long johns). Being that the majority of time this is around my neck (one of the more sensitive areas), it makes me even more impressed with the comfort and softness.

The gaiter measures roughly 8 by 10 inches but can stretch out to almost double that size without a problem. I’ve actually had to double check the specs a couple times. I thought the percentage of spandex would have to be much higher to get this level of stretch. Merino wool has a lot of crimping, which inherently gives it some stretch, but the gaiter also hasn’t gotten saggy, which wool is prone to. It just seems to pop right back into shape without a problem.

The comfortable size range makes it so much more versatile. With older synthetic gaiters I’ve had they’ve either stretched to the size of my head (when worn like a headband or toque) and been too loose around the neck to adequately trap heat, or been tight around the neck but felt uncomfortably tight on my head. I’ve got a long neck (think human brontosaurus) and I’ve found the 10 inches long enough to cover my neck and still bring up to cover both my mouth and nose when the cold wind gets howling.


(Stretched out from 8' to 12' pretty easily)

The seams are all stitched beautifully (there’s only two, but still), something I’ve come to expect from Arc’teryx. There’s no exposed threads and it’s all stitched flat so there’s no rubbing or chaffing.


Versatility/ Adjustability

Here is where the ideal combination of the wool and the stretch come into play. Obviously any neck gaiter is one of the most versatile pieces of gear in my opinion, the wool just adds to that. Here’s some of the many ways I use mine.

The first couple are the more obvious, and intended uses…

  • neck gaiter
  • neck gaiter with mouth and nose covered
  • toque
  • headband (easy to vent a lot of heat out through the top of your head without removing it)


But I’ve also found it useful for…

  • to hold the hot handles on my pot
  • supplemental warmth when sleeping (I’ve found with a toque and your neck covered you can sometimes get by with a lighter bag)
  • inside a kangaroo pocket for extra warmth for my hands
  • used to hold freezing gas pump handles
  • I’ve used it to wrap item in my pack that I don’t watch to get scratched (camera lenses, glasses)
  • I also wrap my hot water bottle in it if I’m not sleeping with it on
  • eye mask when you need a little extra sleep
  • wrapped around your pillow for a little softer luxury





When you pair a gaiter with a toque there are so many variations and tweaks you can make to account for temperature changes, big and small. Having the ability to dump (or add) a lot of heat while on the move, without rummaging through your pack, makes a gaiter more than worth it.

The carotid arteries are major blood vessels in the neck that supply blood to the brain, neck, and face and studies have shown that you can affect your core temperature as much as 1.1 degree Celsius just through the carotid artery alone. Obviously that is an extreme amount (a half a degree temperature swing within the body is big), but when you pair a gaiter with a toque and can have both your head and neck covered or uncovered within seconds, it allows you make those temperature adjustments while on the move.

Breathability/ Warmth

Wool is one of the more naturally breathable options available. I’ve found it exceptionally breathable, much more so than my previous neck gaiter (Polartec Wind Pro fabric). I find it even more impressive because this one is thicker, and warmer than my previous one. Only the highest exertion levels will make you pull it down. Given the fact that it is wool though, it will hold moisture on the outer layer, and in really cold temperatures, freeze. That can make breathing through it tough.

On a climb of Mt.Washington last winter I had a balaclava on and the gaiter layered on overtop of that, pulled right up to the base of my goggles. Temps nearing the summit approached -50° with wind gusts nearing the 100 mph mark, I was huffing hard (I think the guides wanted the group off the summit as quick as possible!), but was able to rotate the gaiter intermittently to keep the airflow.

(Can't really see the gaiter too well, but I'm the one right behind the sign)

Wool naturally draws the moisture away from your skin and can hold up to 30% of its weight in water, so while your skin feels nice and dry it can take a while for the gaiter to dry. The good part is that you don’t have to be too weary about it around a heat source, wool is also flame resistant, so don’t toss it in the fire, but no reason to not hang it up over top.

It also fights off stink really well, and will eventually start to just smell like a campfire. I try to avoid washing mine, but have had to on a couple occasions. I threw it in the washer, like I would with any wool product, gentle cycle and a mild detergent and hang to dry. No problems yet, at most maybe some light fading of the colour.


I feel a neck gaiter is a truly valuable multi-use tool. If you have/ already use one then you know the value of them and may want to look into upgrading to one made with premium materials, albeit at a premium price. I paid $40 (Cdn) for mine, which is no doubt steep, but I would purchase one again, without question, should something happen to mine. The wool fabric, and subsequent workmanship, don’t come cheap. If I knew my way around a sewing machine I may attempt to make my own (doesn’t look overly difficult from a design standpoint), but I don’t. That’s why I just hand over the card, smile and nod.


I’ve had mine for over two years now and use it all four seasons. It’s so tiny there is no reason to leave it at home. So whether it’s a summer backpacking trip, ice climbing in the winter, or just recess duty at work, it’s either in my pack or on me at all times.


Nice review, Jake! Thanks for letting everyone know how well this gaiter works for you.

2 years ago

Sounds and looks like that thing goes everywhere with you. I have a Buff but it isn't quite as multifunctional. Thanks for great review.

2 years ago
Jake W

Hahaha yes, yes it does Kiwi. Exact same idea as a buff, just a few additional uses with wool being the primary fabric IMO.

2 years ago

great review...I have a merino Buff that is also one of my most used pieces of gear. Although I have like 3 other Buffs made of nylon, I like the merino for pretty much all conditions, even the middle of the summer. I second all that you said in your review.

2 years ago

A versatile piece of headwear, which may serve not…

Rating: rated 4.5 of 5 stars
Source: received it as a sample, freebie, or prize (Trailspace Reviewer of the Month prize package)


A versatile piece of headwear, which may serve not only as a neck warmer, but also as a lightweight hat. Very comfortable to wear, and compact in folded state, but not very warm.


  • Extremely versatile
  • Quite good protection from moderate cold and wind
  • May be taken on and off on the go
  • Very lightweight and compact in folded state


  • Not warm enough for temperatures below -10°C (15 °F)
  • Woolen fabric may not fit to everybody

I received this gaiter as a part of my Reviewer of the Month prize, and it’s one of the most useful items in this kit, to my opinion. I use it really often and it appears on most of my photos during the cold season (none of which were staged in this review). It's made of 95% merino wool and 5% elastane, so it stretches easily enough to be put on even while wearing the glasses.

6VEA8YuO330.jpgIn mild weather the gaiter serves as a hat

During the last nine years I was using a thick fleece collar covering the neck and upper part of the chest. I really liked it in comparison to a regular scarf, but there were two major weaknesses:

  1. The collar wrapped around the neck is VERY bulky, especially at the back, where it has huge Velcro patches for size adjustment and easy detachment. With some of my jackets I couldn’t zip the jacket completely in the upper part because of thick collar.
  2. It's really difficult to put on the collar while wearing the jacket. In most cases I had to remove my backpack, then my jacket, and only then I could take on the collar.


Pushing the 30 kg (60 lbs) stroller really hard on a steep hill 

Nevertheless the fleece collar is really warm, and I liked it. My wife has some mixed feelings about this collar (actually we have two of them) as it has the tendency to knot her hair with these Velcro patches.

IMG_6443.jpgWearing the gaiter on the neck in cold weather

But after receiving my Arc'teryx Gaiter I started wearing it almost at all times while the temperature is below +10°C (50°F). It’s very compact in folded state and lightweight, so even in warm weather it finds the place in my pocket. Because of compactness, it can be put on in seconds literally on the go, without the need of removing the jacket (but you’ll need to remove the hat instead).

It’s also very versatile: it can be used for warming the neck (most useful feature), or the upper or the bottom part of the head. I don’t use it for covering the nose and mouth, as I wear the glasses which tend to fog up in such case.

HXRoPcxC__4.jpgAfter getting warm enough you can position the gaiter in place of a hat in a few seconds

In my hiking trips around the freezing temperature I start with this gaiter on the neck and a warm woolen hat with Windstopper band inside — on my head. After 1-2 miles I get warm enough to remove the hat and reposition the gaiter on my head. If it gets colder, I repeat the process in reverse order — and everything is done without lowering the pace! It’s very convenient. In multi-day winter trips I also use this gaiter as a hat at nights, so I don’t need to have a dedicated headwear for sleeping.

eSODa5Jh8SI.jpgA winter night in our Fjallraven Abisko Lite 3 tent

All in all, it’s an excellent piece of headwear. It’s not extremely warm, so in really cold weather I continue using the old fleece collar. But in majority of cases the Arc'teryx Rho LTW Neck Gaiter performs its task very well.


Nice review, Vladimir! I'm glad to hear this item has been so useful for you.

18 days ago

You're correct, these versatile neck gaiters are nice to have when the wind and snow whips at you and your face is freezing and stinging from the high speed snow. I used a similar gaiter at the Mammoth, CA ski resort a week ago when high winds and snow made it hard to see the ski runs.

15 days ago

This is a lightweight and very warm gaiter. I have…

Rating: rated 5 of 5 stars
Source: received it as a sample, freebie, or prize (Trailspace Reviewer of the Month prize)


This is a lightweight and very warm gaiter. I have brought it on my last three trips snowshoeing.


  • Lightweight
  • Warm


  • None

This gaiter is comfy and fits perfectly (one size fits all). It is breathable material and also did not make me sweat. It kept me warm when I needed it and was easy to take off and store in coat pocket when I did not need it. 


Glad to hear you're enjoying your Arc'teryx neck gaiter, Elizabeth.

1 year ago

I've got an athletic neck, which means it's small.

Rating: rated 5 of 5 stars
Source: bought it new
Price Paid: 28 cad


I've got an athletic neck, which means it's small. Been wearing the neck gaiter a few time now and it's warm and not itchy.


  • Warm
  • Comfortable


  • Pricy

Fit is the primary thing why I bought this article. It feels great, stretches perfectly and is not itchy. The only thing that could be improved is the price!

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