Lightweight InsulationLightweight Insulation


Light, warm, flexible.

Start your base layers off right with the Arc'teryx Men's Rho LT Zip Top. The Rentex Powerflex fabric ensures plenty of warmth, next-to-skin comfort, and all the freedom of movement you need for skiing, climbing, or hiking. Arc'tery added a laminated chest pocket and underarm no-lift gussets to set this top apart from all the other shirts out there. There's no question which one to pick when you dig into your drawer for something to wear in the mountains.

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Arc'teryx Rho LT Zip Top - Long-Sleeve - Men's

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Here's what others have to say...

Unanswered Question

How does the Rho LT compare to a Pat...

Posted on

How does the Rho LT compare to a Pat Capilene 3 MW Zip?

3 5

Rho LT top - not perfect

Picked this up on SAC a while ago.

I like the Powerflex Fabric. It stretches well and has good warmth for the weight in dry conditions (see below).

I have two quibbles with the Rho LT, however. First, the shirt is short. While it has the no-lift gusset design, the hem of the shirt is already above my belt-line, so unless I'm wearing bibs (and I am, usually), my waist gets exposed. It fits well in other dimensions - sleeve length, chest size - but the torse is just too short for me. Second, the fabric is slow to wick. On a skin track, I sweat. The Rho soaks through quickly, rather than transporting moisture for evaporation. That makes for a cold panda when skinning gives way to making turns.

I've never given an Arcteryx item three stars before, but it seems the Rho LT top was just not made for me. I've started switching to merino and I've found that I'm comfortable in a wider range of temperatures and moisture levels in wool than in the Rho LT. Perhaps the Rho LTW would be a worthy upgrade.

van gogh gold

van gogh gold

Posted on

Responded on

Really great top if you can afford it. Had mine for 3 years now (with it getting worn at least once a week in all that time) and it still looks new. The fit is snug so if you like room then size up one size. 5 stars!

5 5

Must have

Nice tight fit, love the fabric. Use it for hicking and when i go telemarkskiing =)
165lbs 6.1 f medium, tight and nice fit

5 5

Great Great Great

One of the best Arc'teryx items I own. Great stretch and give in movement. Im 6'1 165lbs, 33 inch sleeve and I went with a large. Went up to an XL and was alittle loose in the chest and mid back

5 5

like an old blanket

........but doesnt fit like a blanket; standard fit. like most Arc products this a high quality piece of gear. Super warm, super soft next to skin. I would not recommend this for use over 32dF, high aerobic activity, its just too warm. my primary uses are back country winter hiking in WVA and long cold days on the lifts as a baselayer. with the discontinued colors on sale, I will be purchasing another.

4 5


Another excellent item from Arcteryx , quality of workmanship and fabric is 5*. I am always in between sizes with their products, "L" tops are always slightly too big. However LT Zip is almost too tight! I am 5.10 and ~ 185 and this top is like second skin. I don't understand Arcteryx's sizing, total lack of consistency.

Responded on

They are very consistent. Pieces are tailored to be base layers, mid insulating layers, or outer layers, and each is explicity tailored to perform its function. This is a base layer and is meant to be worn clinging to the skin to absorb the sweat and wick it to the surface for evaporation. Some of their jackets are cut in an athletic fit to be worn over light layers, and some are cut full to be worn over thick insulating layers.

Responded on

Amen Rian,

Arcteryx is the most precise fitting gear you can buy. YOu have to understand these guys engineer each garment for a purpose. If you a large buy a large and if you are buying the gear for its intended purpose and not to be a poser it will fit!

im 6' and 150lb. i dont know if i should...

Posted on

im 6' and 150lb. i dont know if i should get a medium or a large. i want it for a fitted warm up but not a skin tight base layer

Responded on


I do not think the arm length will be long enough in medium....

mt timpenogas

mt timpenogas

Posted on

there ya go.

Responded on

Spelled Mount Timpanogos. Sorry, it's my home of the finest!

5 5

stylish and functional!

So0o0o0o0o0o0o0o0o0o GOOD!! fits great in all the dimensions. fit to normal street shirt size. super high quality.

5 5

great for everything

i wear this thing alot and everyone compliments me on it. fits great and soft

3 5

Good, but there are better/cheaper options

I have had this for about a year. I am 6' 205#s and the xl is pretty snug. As a baselayer it does it's job. I would call this medium weight. That being said, I just got the Stoic merino wool zip neck and I like it better and it's cheaper. Also, I don't know how to explain this, but the material of the Rho snags on dry skin, no big deal, but unpleasant.

4 5

o.k. base layer

If color is imperative then this will work fine. Just o.k. in the warmth and wicking department. The Arcteryx LTW with real merino wool smokes this and fits a ton better too. Have owned several LT and LTW tops. If you work hard as a skier on back country hikes to get to your stash or skinning the LTW will dry way quicker and is warmer in a good way. Seems to regulate your body heat better. I'm 5'11 162-165 with long arms and broader shoulders. I order large in base layers and medium in outer. The LTW stretches and hugs your body better. The neck on the LTW isn't sloppy like the current LT. Had LT's before and the cut seemed to be better than the current issue.

5 5


Just got one of these, and the fit and quality are typical of arcteryx (better than pretty much anyone else). The material is quite light, but provides a fair bit of warmth. Likely to be a bit too hot if you are really working. Does not bind under other jackets. beware, the size chart is a bit misleading, as I would personally go for the next larger size than what is recommended, especially if you are tall. I have a 38 chest, so I ordered the small, which felt like it was painted on and did not even cover my belly button.

5 5

Best shirt in the world

Bought two now. One for husband, one for Dad. Soft, VERY warm, stylish, and light/compact. Does well in washer/dryer. Have been happy with all Arcteryx gear. Although expensive... worth every penny. Especially when living in cold northern climates

5 5

My favorite base layer

I have used the Rho alpine and xc skiing as well as on many hiking trips with temps ranging from around 50 degrees (F) down to 0 degrees (at the base of the mountain). This layer is amazing in the range of temperatures that it covers, I rarely overheat and yet it seems to keep me warm when the temperature drops. It is very comfortable and dries quickly, I have an average build (5'11" around 175 lbs) and it is snug on me, but very comfortable (the way a base layer should be). I am planning on getting a couple more of these and making this my standard base, it is a little pricey, but well worth it.

5 5

Bought a couple at a deal...

and have been thrilled with the my review of the bottoms I say how I prefer the powerstretch but I really like these on top as a first layer. Combined with a thicker wool sweater these are a part of a super versatile layering system that adjusts to different temperatures well

5 5

Great for running in cool weather

I just used my Rho LT for for the first time on the Fort Bliss 10k run in 40 degree weather. It did a great job keeping me warm while wicking sweat extremely well. However, you might need a jacket if it is much colder or windy. As for the sizing, I'm 6'1" and 210 lbs, and the large I ordered fits perfectly. For me, it's a perfect athletic, the pocket is extremely useful for carrying a key and/or ID.

5 5

Great softness.

I have two Rho LTs and Those always give me a lot of
softness and warmth.
In many cases I wear size M, but I should buy size L, so I hope that gives a more precise sizing chart for this cloth. And color in picture of website is much more brighter than that of real thing.
Except these, this is one of the best layering wear.

5 5


Awesome! Feels very soft next to my skin, sleeve length is perfect for a guy who is 5"8 and ordered large size Rho. Attention! You might want to size up with this item. Medium sized Rho was a bit too tight for me in shoulders so I had to exchange for a large one. I also think that an extra large would fit me almost fine although it probably would not have snug fit.

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