How to Choose Base Layers
Arc'teryx Rho LT Base Layer Bottoms - Men's
$100.00
When it's cold out, the men's Arc'teryx Rho LT bottoms are your lightweight thermal base layer for low and medium output. They add warmth, move moisture and feel soft on the skin.
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- Updated with a more comfortable trim fit and a resized side thigh pocket with a hidden zipper that accommodates a smartphone
- Torrent™ stretch fleece manages moisture, provides light warmth and performance stretch; it's also brushed for softness
- Polygiene® treatment provides long-lasting odor control
- Elastane fibers add stretch and work with the articulated patterning and gusseted crotch for freedom of movement
- Great warmth-to-weight ratio
- Waistband features asymmetrical elastic and is designed for comfort and easy layering
- Flatlock construction improves next-to-skin comfort
- Trim, next-to-skin fit aids thermal efficiency and moisture transfer
- Contains materials that meet the bluesign® criteria
- Weight: 6.3 oz. (180 g)
Imported.
View all Arc'teryx Men's Base Layer Bottoms| Best Use | Multisport |
|---|---|
| Fabric | Torrent 190 (84% polyester/16% elastane) |
| Moisture Wicking | Yes |
| Quick Drying | Yes |
| Fly Opening | No |
| Underwear Weight | Lightweight |
| Inseam (in.) | Unavailable |
| Gender | Men's |
| Sustainability | Contains materials that meet the bluesign® criteria |
Arc'teryx Clothing - Men's
| XXS | XS | S | M | L | XL | XXL | XXXL | XS Short | S Short | M Short | L Short | XL Short | XXL Short | S Tall | M Tall | L Tall | XL Tall | XXL Tall | 28 | 30 | 32 | 33 | 34 | 36 | 38 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chest | 33 | 35 | 37 | 40 | 43 | 47 | 51 | 54.5 | 35 | 37 | 40 | 43 | 47 | 51 | 37 | 40 | 43 | 47 | 51 | |||||||
| Sleeve Length | 30 | 31.5 | 32.5 | 34 | 35 | 36 | 37 | 38 | 32 | 33 | 34 | 35 | 36 | 37 | 33 | 34 | 35 | 36 | 37 | |||||||
| Waist | 27 | 29 | 31 | 34 | 37 | 40.5 | 44.5 | 48.5 | 29 | 31 | 34 | 37 | 40.5 | 44.5 | 31 | 34 | 37 | 40.5 | 44.5 | 30 | 32 | 34 | 35 | 36 | 38 | 40 |
| Hip | 32.5 | 34.5 | 36.5 | 39.5 | 42.5 | 46.5 | 50 | 54 | 34.5 | 36.5 | 39.5 | 42.5 | 46.5 | 50 | 36.5 | 39.5 | 42.5 | 46.5 | 50 | 35.5 | 37.5 | 39.5 | 40.5 | 41.5 | 43.5 | 45.5 |
| Inseam | 31 | 31 | 31.5 | 32 | 32.5 | 33 | 33 | 29 | 29.5 | 30 | 30.5 | 31 | 31 | 34.5 | 35 | 35.5 | 36 | 36 | 31.5 | 31.5 | 32 | 32 | 32 | 32.5 | 33 |
Sizing Notes
Measurements are stated in inches unless otherwise indicated.
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Colorado Hiker
Received free product
Fort Collins, Colorado
State of the art - I'm Impressed!
1 year ago
Comfort. Fit. Function. I can't believe how soft these are. Normally I must wash anything next to my skin, but I've worn these several times and haven't needed to wash them yet. This base layer allows freedom of movement while just snug enough to easily fit under a variety of bottoms. I'm 5ft 11in, 185 and wear 32x32 pants. The medium was perfect for me and would be great for taller guys - there's probably another 3 or 4 inches of length. The waistband made layering easy - I don't know how they did that. No fly leads to less complication and less weight = thank you! The slash pocket is great for a garage remote, keys, or a couple of ID cards but would NOT fit my smaller smartphone. I've been gravitating toward black bottoms, but the green color looks great. The contrasting pocket color stands out but it stays out of the way if you don't need it. I wore this with gym shorts out for a jog in brisk weather and the pocket access was perfect. I went on a short hike with lightweight tech hiking pants that fit snug on my thighs; not great in 30deg weather. Combine this with more loose fitting long pants and you get surprising warmth. I wore under a pair of straight-cut denim jeans (slightly loose through the leg) while clearing autumn leaves and again while shoveling snow in 20deg weather; this kept me much warmer than usual and I didn't have that redness on my skin afterward. Nice work, Arc'teryx Team!
Age:45–54
Weight:175–200 lbs.
Height:5'11"
Yes , I recommend this product
coder005
Received free product
westminster md
Super comfortable fit and nice stretch!
3 years ago
Out of the box, these are top notch, soft to the feel, seams placed out of the way so no chafing, warm and they are in between the fit of joggers and actual tights - see pics attached. I used them first time out for hiking on the trail, where it was low 40's temperature. I know they are made to be used as a base layer, but there will not be any snow in Maryland until the winter. For sure then I am looking forward to placing them underneath as a base layer for snow sports. I will also plan on running in them when the temperatures dip below freezing. There is one pocket on the right outer thigh, was hoping this would be large enough for a cell phone, but its only good for a few credit cards/ID and cash, maybe a car key and chapstick or a granola bar and energy gel. I own a size small
Age:35–44
Weight:125–150 lbs.
Height:5'7"
Yes , I recommend this product
Uptownlarry
Received free product
Butte, MT
Supple base layer but good for cool activity too
1 year ago
Great cool to cold weather product for outside activities. The muted color of the bottoms I got are fine. but as a color-blind guy, this is not my strong suit. The fabric is extremely soft and stretchy – making for a very comfortable fit for all positions. They compare well in comfort and fell with merino wool base layers of similar weights. I got the medium size as I have a 32-33” waist and was concerned that the length would be too short for my 34” inseam. However, the fit is perfect. I think that has something to do with the stretch of the fabric. Though they fit comfortably from my waist to my ankles they would likely accommodate various inseam lengths. I have only used them for long walks and single-track bike rides so far and find them perfect for cool, not cold, days. I look forward to using them as underlayers beneath shells or insulated pants for biking and skiing once snow arrives here. I will consider getting an upper base layer to replace some of my older items.
Age:65–74
Weight:150–175 lbs.
Height:5'11"
Yes , I recommend this product
ShoppingBag
Received free product
Anchorage, AK
Extra warmth for low exertion activities
1 year ago
The Arc'teryx Rho LT base layer bottoms are advertised as "lightweight" but I would call them more "medium" weight. This is an ideal thermal base layer for (a) low exertion activities in cold temps or (b) folks who get cold easily like me! The Rho LT bottoms use Arc'teryx's super soft Torrent™ fabric, which is lightly brushed on the inside (for increased warmth and moisture transfer) and smooth on the outside (for no friction or chafing when worn under other clothing - even jeans!) The fit is perfect for those of us with biker legs (i.e. trunks!) and the length of these size Large bottoms was perfect on my 6' frame. The pants are (mostly) form fitting and stretch easily with movement, but never feel too constrictive or like they might fall off – I suspect the articulated patterning and gusseted crotch are responsible for this freedom of movement. The waistband is flat and comfortable, so there's no bulkiness at the waist when layering. THere's also a SMALL thigh pocket where you could stash keys or a small phone, but honestly I can't see myself ever using it (it's awkward to reach under your outer layers to dig something out of a thigh pocket.) The color I got is "Pytheas" and it's a subtle mixture of dark green and turquoise. I would HIGHLY RECOMMEND these to anyone.
Age:45–54
Weight:175–200 lbs.
Height:6'0"
Yes , I recommend this product
Justin
Received free product
Denver, Co
Cozy Athletic Base Layer
1 year ago
This is a great base layer. It feels so soft and smooth. I also stayed comfortable after getting dressed before heading out into the cold, but was plenty warm and comfortable while active in below freezing temps. A great layer for snowshoeing, winter hiking, etc. The side pocket is great for keys or a small wallet.
Age:25–34
Weight:175–200 lbs.
Height:5'6"
Yes , I recommend this product
Alaskan
Received free product
Anchorage, Alaska
Comfortable and warm
1 year ago
So, I received these guys and at first I was not really sure what the idea or intended use is, they have the little outside pocket and they fit and feel almost like a tight for climbing or biking. I went to the manufactures website then I was like oh yeah, base layer. The first time I wore them, I did wear them just as tights, went for a walk with my dogs it was in the 30's (F) and id say my legs were cool, not warm not cold but comfortable. As fate would happen, temperatures dipped, and we started to receive snow here in Southcentral Alaska. So I started wearing them as their intended use, a base layer under what I wear as shell pants. In 20's with moderate activity like walking at a decent pace they are pretty darn warm, almost too warm for me and my comfort, teens are a bit more comfortable although thats me and I run warm. Below that I would add a layer, mind you these are a little bulkier than any base layer i've ever worn but I typically wear wool. These would be great for moderate temps riding the lifts, in colder temps teens and below if you are doing more active pace like saying skinning up to get some turns or fat tire biking they would be great as a single layer. They do have a soft feel next to your skin and are pretty breathable, I like the cut, fit and feel. Im 5'8 and got a large but they are a tad long i'm sure I could do a medium. The longer I own them the more I think situations or uses, these would be great for a climbing trip where your hanging in the tent, stow a lighter in the pocket. Or Hut trips, you've skied all day shed the shells and boots and now just want something to brew up some hot water in. All and all a versatile and solid product.
Age:45–54
Weight:175–200 lbs.
Height:5'8"
Yes , I recommend this product
Kons
Columbia, MD
Very poor fit and design for new updated model
2 years ago
Newly updated model has very poor fit and design comparing to prior models that had such a great feet. New model has very high waist line that has a thicker band that is very uncomfortable positioned so high above the waistline. The overall length in size M, is 2.5" longer comparing to prior model that creates multiple wrinkles and would result in hot spots in the ski boots. I am 6'1" and I only see this product fit properly for someone who is way taller that I am, to compensate for 2.5" in wrinkles. Very disappointed. Arcteryx stop changing sizes. I used your products for 20 year and this one is the biggest disappointment.
No, I do not recommend this product
Originally posted on arcteryx.com
Response from arcteryx.com
Customer Service
2 years ago
Hello there, Thank you for reaching out and sharing your feedback on the Rho LT Bottom. We're genuinely sorry to hear that you're disappointed and that it did not suit your needs. Our customers will occasionally read these reviews, so we appreciate it when others share their experiences with us, and we will be sure to pass your comments along to our design team. If you have any additional comments or concerns, we welcome you to contact our Customer Service team, and one of our representatives would be happy to assist you. All the best
Kons
Columbia, MD
Very poor fit and design for newly updated model
2 years ago
Newly updated model has very poor fit and design comparing to prior models that had such a great feet. New model has very high waist line that has a thicker band that is very uncomfortable positioned so high above the waistline. The overall length in size M, is 2.5" longer comparing to prior model that creates multiple wrinkles and would result in hot spots in the ski boots. I am 6'1" and I only see this product fit properly for someone who is way taller that I am, to compensate for 2.5" in wrinkles. Very disappointed. Arcteryx stop changing sizes. I used your products for 20 year and this one is the biggest disappointment.
No, I do not recommend this product
Originally posted on arcteryx.com
Response from arcteryx.com
Customer Service
2 years ago
Hello there, Thank you for reaching out and sharing your feedback on the Rho LT Bottom. We're genuinely sorry to hear that you're disappointed and that it did not suit your needs. Our customers will occasionally read these reviews, so we appreciate it when others share their experience with us, and we will be sure to pass your comments along to our design team. If you have any additional comments or concerns, we welcome you to contact our Customer Service team, and one of our representatives would be happy to assist you. All the best
forest
columbus, ohio
revised product is a "no-go" - you'll regret it
3 years ago
Rho-LT from last season were great but was only able to get 1 pair. Tried this new season style and they are bad. The fit, fabric, and design has changed significantly. The waist band is now thick and gathers creating friction between your skin and an outer layer which equals discomfort. Fabric is thicker and does not conform as well to body shape. Would definitely NOT recommend these as a base layer.
No, I do not recommend this product
Originally posted on arcteryx.com
Response from arcteryx.com
CS
3 years ago
Hello Forest, Thanks for taking the time to share your valuable feedback with us. Our customers will occasionally read these reviews, so we appreciate it when others share their experiences with us. We're genuinely sorry to hear that you're disappointed in the Rho LT Bottom. Many times our opinions on gear can come down to personal preferences. We appreciate your feedback regardless and will be sure to pass your comments along to our design team. If you have any additional comments or concerns regarding our products, we welcome you to contact our Customer Service Department. at 1-866-458-2473 (available Monday-Friday 8:00 AM- 5:00 PM PST). One of our representatives would be happy to assist you. All the best  
HikingWithJon
North West Ontario
Perfect base layer and moves with you.
4 years ago
The RHO LT Bottom is the perfect base layer for the Fall and Winter. Snug, warm, soft and stretchy material cut to move with your body. And even though nobody will see them, they look cool, like scuba pants. I wear them underneath my Gamma LT Pants (Large) and I've been toasty warm down to -10C so far. I'm 6'1 and a bit, around 200 lbs with a 37" waist and the Large is a perfect fit.
Yes , I recommend this product
Originally posted on arcteryx.com
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