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Discover the ultimate comfort and warmth with our collection of merino wool bottoms. Crafted from premium merino wool, these bottoms offer exceptional softness, breathability, and moisture-wicking properties, making them ideal for any season. Whether you're layering for outdoor adventures or lounging at home, our versatile styles provide a perfect fit and superior insulation. Enjoy the natural temperature regulation of merino wool, keeping you cozy without overheating. Elevate your wardrobe with these essential bottoms that combine functionality and style effortlessly.
$115.00-$125.00
I got These for skiing and they were pretty warm and comfortable. ... It ’s a great base layer that I can depend on. ... They are warm for sure but I can ’ t wait
5
Maw maw Z
My legs will not be cold this winter. They are of good quality and very soft and warm.
5
Sydroo
Fits true to size. Keeps you warm! Relaxed fit and love the color. Makes snowboarding more enjoyable.
5
Mim1
Used these under sweats in below freezing temperatures in Quebec City sometimes needed snow pants too, other times just the two layers.
5
DreambornAnthology
Love Smartwool for days in the snow. It ’s a great base layer that I can depend on. It is super soft when you first buy it but does get scratchier with wash and wear, even with gentle cycles, mild detergent, and hang drying. I tend to wear a thin, cotton free layer underneath for better comfort and more layers. While it does offer some stretch, it is very true to size, so if you are teetering between sizes, size up. You ’ ll be more comfortable and won ’ t risk circulation compression, which will ultimately make you more cold.
5
Kpave
[ These fit so great! I ’ m plus sized and sometimes sizing can be wonky or vague but these are a dream. They are warm for sure but I can ’ t wait until The temperature dips to really put tgem to the test.
$125.00
Smart wool has always made quality products and these are no different. ... Perfect weight to stay warm in cold weather. ... I love how they keep me warm but do n't make me
5
tjflan2
Fit true and worked outstanding as base layer for football game. Very comfortable and breathable.
5
Mountain time
Fit great especially in length. Perfect weight to stay warm in cold weather.
5
Kwhendy
Bought these about a week ago and wear them nearly every day. I love how they keep me warm but do n't make me hot.
5
srgmnh
These really are a step above. Great fabric, great warmth, hold their shape well. Worth every penny.
4
Jdub
Smart wool has always made quality products and these are no different. But… awfully pricey for a pair of long Johns!
$115.00
Exactly what you expect from smart wool base layer ... They are exactly what you expect from smart wool. ... [ I got these as a gift for someone and was impressed by how soft they
5
Connie
[ My old lady and I have the smart wool top and bottom 250 base layer set. They are exactly what you expect from smart wool. Great quality, the warmth I needed, and pretty useful in most conditions. If you need a base layer or something lightweight to wear on a chilly/cold night- These are useful and for great value.
5
Britt802
[ At first these pants feel sort of itchy but once you 're moving around in them it's very comfortable. I first wore them in 35- 40F under normal hiking pants and was too warm while moving. They do regulate body temp well but I wo n't be wearing these hiking unless it's below 35F. I 'm also not a cold bodied person and I move fast.
5
jjrunning
[ We live in Minnesota, and have pretty cold winters. This baselayer has kept me much warmer than my old baselayers, so far! Great for running, walking or casual use. I plan on using them for a winter camping trip coming up as well.
5
KonaSunsets
[ Bought these as a gift. My daughter said her husband LOVES them. He's had a pair for over 10 years and they are worn out. So a new pair was needed.
5
jackie27
[ I got these as a gift for someone and was impressed by how soft they were. I haven ’ t worn them, but he ’s said they ’ re very warm and not itchy at all. I ’ ll definitely be buying a pair for myself soon!
$150.00
They are super comfy and the cuffs on the bottom are stylish. ... Super comfy, all the benefits of wool. ... They fit true to size and the merino wool is very
5
nederlandsehardloper
I bought these pants a month ago and I love them. They are super comfy and the cuffs on the bottom are stylish. They are also warm. If only I could get them to pass as dress pants...
5
Cookie
These pants should be illegal they 're so awesome. Spent 3 weeks in Asia trekking in either these or a pair of Swift pants. Only wish the pockets zipped, but that does n't detract from their comfort. They run a little more relaxed than other Icebreaker stuff; not baggy, but definitely roomier.
5
Nomi
I wear these for sport, around town, on the plane.... They 're flattering and comfy. The fabric is the usual high quality Icebreaker merino that never disappoints-- no stretching out or pilling. Size runs true to generous.
5
SarahMN
Loves these wool sweatpants! Super comfy, all the benefits of wool. Great for warm up and cool down, yoga, travel and just hanging out.
5
Carolyn
[ Go to pants! The waist band is perfect. No buldges above or below. You know what I mean! Light weight for all day long wear yet warm. I would buy again.
$125.00
I got medium top and bottom and they are true to size. ... My wife and I bought two sets each of tops and bottoms and she just simply loved them instantly ... [ These are great and probably my favorite pair of base layer
5
cathy
[ I bought these and the matching top for a hiking trip and LOVE them. They are so soft and comfortable and kept me warm without making me sweat. Perfect!
5
Karen
[ Amazingly soft and NOT itchy at all! High quality and fits very comfortably. Can ’ t wait to try it out soon with cold Michigan winter up north!!
5
Lynn
[ Love the quality and softness of these wool undergarments! I got medium top and bottom and they are true to size. I hike alot in the winter in the Smoky Mountains. These garments kept me cozy and warm! Love the mint green color also!!!
5
inaudwetrusr
[ These are great and probably my favorite pair of base layer bottoms. They are cozy, not too tight and breathe nicely. I ’ d like to buy another pair but my size is out of stock.
5
Ralph
[ I am an avid walker and must have my daily jaunt or I will go bonkers. I have hiked in all weather from the cold sub temps of Minnesota to the rainy and windy winters of Texas. Having warm thermals are essential. Searching online reviews, Smartwool keeps popping up. My wife and I bought two sets each of tops and bottoms and she just simply loved them instantly When ever the temp dips she gleefully pulls on her Smartwool NTS and a shell and she is out the doors. The material is just the right thickness and the seams are well hidden. It instant warms the body and as claimed, do not smell after a few uses As for durability we have to wait and see. We have other woolen garments and we can see these products appear to be durable. No regrets buying them but regrettably the color choices are limited due to stocks available.
See Price in Cart
WAS: $120.00*
$120.00
[ These shorts are comfortable. ... So comfy. ... Love that they are anti- bacterial and no- stink. ... They are so comfy! ... Comfy shorts! ... I definitely bought two pairs and will likely buy
5
kurklk
[ These shorts are comfortable. I am actually using them as jammies right now. Love that they are anti- bacterial and no- stink. They look great to go outside also. Multi- purpose. I will probably be buying another pair in the future. Love icebreaker products
5
Gi
[ I spoiled myself to buy these for home use. So comfy.:)
5
JM
[ I love how these fit and how they feel! They are so comfy! Finding shorts that fit is always hard and these are just the right length to width ratio.
$140.00
I typically get a size small for base layers, but love the medium for leggings to wear with oversized sweatshirts and sweaters. ... Super comfy, warm, durable( they still look like new after many washings), and the patterns add a fun
5
Andi
[ These are my everyday leggings for the winter season. Super comfy, warm, durable( they still look like new after many washings), and the patterns add a fun styling. I typically get a size small for base layers, but love the medium for leggings to wear with oversized sweatshirts and sweaters.
$115.00
The merino wool provides that sweat wicking warmth that is so necessary for a base layer in skiing. ... I will definitely get this top and it ’s matching bottom in new colors as they become
5
Julia
Beutiful set. Soft, breathable. Love the color. It doesn ’ t compress your body or stomach
5
Trixie
Very comfortable, warm and lightweight. I would recommend!
5
Mandy C.
Fits comfortably and looks great! Really glad I found this brand.
5
Kate
My new favorite base layers! They fit like a glove and keep me so warm in even the coldest conditions. Obsessed with the Alpine color, so cute!
5
Sam
My absolute favourite base layers. Wish I could live in these legging.
$140.00
I bought my first Merino wool in New Zealand and never regretted paying the big bucks. ... Comfy& warm! ... [ A friend wears these when we walk and they look so warm and comfy so I bought a
4
MtnMama28
[ A friend wears these when we walk and they look so warm and comfy so I bought a pair. They will be great for walking, travel and lounging because they are very warm and lightweight. I bought my first Merino wool in New Zealand and never regretted paying the big bucks. The 4 star rating is because of fit. The Small size is very baggy. I am thin, 120# 5' 7 '' and I feel even an XS might be that way. I will still enjoy them because they are warm. I was just hoping for more of a yoga pant slimmer fit for potential evening wear.
$130.00
Perfect for Long Cold Days!!! ... Extremely comfortable and warm, kept me warm all day. ... I received a size medium, which fit snuggly, but if I was going to order them again I would size up to a
5
BellaJohn
[ These leggings are so warm and fit so well! They are super cozy and kept me warm all day skiing! I love the white stitching, it makes the leggings SO flattering.
5
tarynashh
so happy with these base layers!!! what i love most is the quality, sustainable materials. they are breathable and do n't make me sweat, but keep me warm. they stay put and i do n't have to adjust at all. the contrast stitching is super cute too.
5
brynnsadventures
[ If you have a small waist but thick thighs or bum, definitely size up. I usually wear I size 4- 6 in most leggings but find in merino layers I have to size up because it's tight around my quads, these are similar. I received a size medium, which fit snuggly, but if I was going to order them again I would size up to a large. The quality of these leggings is amazing! So cozy and comfy!
5
sumho
wore these for a ski trip recently and they were very comfortable and provided good warmth with my bibs for a couple days of downhill skiing
5
JJJCCC
Love, love, love. Sized up for a more comfortable fit and they ’ re perfect. These have become my go- to base layers for cold ski days in the North East. Love the color options as well.
$130.00
Itchiness is minimal but still present but it ’s wool blend so I can tolerate it. ... Warm and SUPER comfortable! ... Comfy texture. ... There are very soft and not itchy at
5
Sarah G
I ca n't wait to use these for travel, SO comfortable. I did size down, I usually wear and XL and went with an L.
5
Gi
[ Love the fit& the color. Comfy texture. It runs small/ size up.
5
JB
[ Super soft and warm, work great under snowpants or another pair of leggings. Gets looser with wears, probably due to natural fibers.
5
Fearsnocold
[ Good as a base layer or for running in the cold, just as I had hoped.
5
April
[ Comfy and soft. I purchased a XL I am 5' 4 '' and weighed 175lbs at the mid of my second trimester being pregnant and the fit nice. I think they will fit nice after birth too though I might need to go get a M or a L later. When not pregnant I 'm less curvy with no baby bump, I usually purchase mediums. Though occasionally a large if the fit is really `` fitted ''.
$99.00
The description of the alpine merino liners on the wetsite was great, and the measuring chart also was exact. ... Fits perfectly, very comfortable, use for hicking and
5
Ozzy
[ Comfortable; warm but not too hot. I have bought multiple pairs for backcountry skiing, hiking, and winter/ fall hunting when temperatures begin to drop in the mountains.
5
Josh
[ Had these for a month. Worn them, washed them, no problems at all. I 'm 6' 1 '' and bought a medium and they were the perfect length. Breathable but warm enough for freezing temperatures.
5
Marty
[ Size XL fits me very well, 225 lbs 38 waist x 32 inseam. Not tight, not baggy, I hardly know I 'm wearing it. One winter day hike so far( mid 20's f), kept my legs warm. Ca n't rate durability yet, but construction quality looks good.
5
Scott
It is a great lightweight piece for high- exertion activities where you may need an extra layer for warmth. I wore these for a few days in a row, and they held their shape and did n't stretch out as some wool pieces will over time. I am 5' 6 and 150lbs, and the small is a perfect fit.
5
Jonathan
As expected, the weight and comfort of these are great. I 've worn them under ski gear and as an extra layer for a bike packing trip. I have n't really tested durability yet as they are pretty new, but the quality seems very good.
$35.00
[ Super soft wool against my skin! ... Best merino undies ever! ... [ I have recently started wearing merino undies, and these are the best! ... Love these underwear- good fit, keep you warm and wick away
5
Juno
I like the black one very much. You barely notice its existence. But that's what makes me depend on it. It looks like it would sustain for a long time. I like things that will last.
5
Susan
[ I thought this was a ridiculous idea- boy was I totally wrong! Love these underwear- good fit, keep you warm and wick away sweat! you will love them!
5
Jakie
[ I have recently started wearing merino undies, and these are the best! They fit well, wear well, and wash/dry quickly. They are great for travel! They are particularly nice if you live in colder climates where you must wear multiple layers to stay warm, including long underwear, but I 've also worn them in the tropics and even as a swimsuit( more or less, lol). Great for all- around use, year- round use in all weathers!
5
chupacabra
[ These are super breathable and odor resistant. I originally bought these for hiking and travel and now I wear them everyday, they 're pretty much all I wear. For travel, when you can only take a few pairs of undies and have to hand wash and hang these to dry, I 've found these dry faster than synthetics
5
Julie
[ These underwear are so comfy. I was a little apprehensive of the wool, but these are like wearing nothing. These area great for hiking, biking, running or everyday wear!
$150.00
The merino Wool is very soft and comfortable. ... Has a nice feel, a little cooler, since it's not 100 percent merino. ... I then upgraded to the Icebreaker joggers I had always wanted, which are perfect for lounging and for outdoor
5
LALALA
Wish the ladies clothing had longer inseams, but not complaining, as I found these, and love them! I 'm a 31 inch inseam and the S is perfect!
5
Bicichica
[ Decided to try the mens medium, even though I 'm a woman large in these joggers normally. Fits fine. And love the russet neutral autumn wheat color. Has a nice feel, a little cooler, since it's not 100 percent merino. Ice breaker is one of my favorite brands!
5
Laura
[ I bought another brand's merino pants a few years ago when I found them on sale, but within a year they were stretched out and kind of a mess. I then upgraded to the Icebreaker joggers I had always wanted, which are perfect for lounging and for outdoor wear! I love mine so much that I bought these for my husband. They 're a great color, plenty long for his 6' 2 '' height, and cozy but polished. We are huge fans and from now on it's Icebreaker or nothing.
5
Kyle W
The merino Wool is very soft and comfortable. Seems to hold up well so far over the first 3 months. Pretty stylish in my opinion for a type of sweatpants, I feel good wearing them at home or out to the store quick. The seems accurate, I am 6' 1 '', 190 lbs and got a Large.
5
Fly Girl
I 'm a women, but prefer a regular rise- not high rise, as offered in the women's joggers. I did not want cropped. These are a great fit, just what I wanted. I have the black and the grey blue. I wear them out and about doing errands, with merino tee shirts around the house. A good choice for lean athletic women. Please keep making these. Dark grey Navy, forest green, and higher wool maybe?
$60.00
The fabric was amazing and unexpected by me given they are wool, the only bummer is that I am in between xs and small so I had to return. ... Smart wool running
5
Kelley
[ The shorts were beyond my expectations! The fabric was amazing and unexpected by me given they are wool, the only bummer is that I am in between xs and small so I had to return.
5
Jules
[ Great: style, fit, material, design. The liner is not tight like ALL OTHER women ’s shorts- no show liner! The zipper in the back is perfect for chapstick and a key. I have many of these shorts, my go- to for any run 5 to 50 miles.
5
salishfrog
[ These are so comfortable- I just bought another pair! They 're a trim fit without feeling constricting and I have n't had any chafing issues, even when they 're totally wet. I like that they dry fast so I can rinse and repeat. The 2 pockets feel secure, too. I 've had my first pair for a year and they look new so I think these will last a long time.
$47.95
WAS: $48.00*
The wool breaths well, you always feel comfortable. ... Breathable too! ... The fabric is a good weight. ... [ These are super soft& comfortable. ... Great for any outdoor
5
MPWC
[ I 've bought this pair and several other smartwool merino box briefs of various models. All of them fit great and are very comfortable. They all seem to last a long time as well.
5
WoolyWearer
[ I have three pair of these and they 're my favorite underwear. One of them seems to have been sewn slightly different as it fit just a little different and felt like it was riding up for the first few weeks or so, but it eventually broke in and now feels the same as the other two. These are pricey for underwear but a fair price for something that's Merino and built to last. My oldest pair is 4 years old and shows no sign of wear. I treat them well- I do n't over wear them, wash only in cold water, and hang dry.
5
MamaBear
I bought two of the Smartwool Men's Merino Boxers for my son for Christmas. He loved them and we went back to the store to buy more!
5
Hal J
[ Best underwear ever! Wear these things for a week while riding, hiking and sleeping. No washing needed. Unreal. Blah, blah, blah… if you want comfort and quality this is it. Yup, they cost more and don ’ t last as long as poly.
5
MLB93
[ I ’ ve used these a few times are longer hikes. Designed perfectly and hold true to their shape. Breathable too! I feel they would be great for any season.
$60.00
Lightweight, great material, deep pockets and so comfortable! ... Perfect for hiking or any other outdoor adventure. ... Light weight an comfortable ... I will be using these for
5
kh311
[ I love these shorts — I find it almost impossible to find shorts that fit me( narrow waist, curvy through butt and thighs), but these fit perfectly. The material is light, comfortable, dries quickly, and seems to resist odors better than other athletic shorts I have. The little zippered pocket is a nice touch, too. I only wish they came up a little higher on my waist! 5 ’ 5 ” 120 lbs, ordered size XS.
5
Sknight
[ Surprised how comfortable these short are. Very high quality. I like the fit alot, not to short not to long. I will be using these for hiking. Worn about 7 times now and still loving them.
5
Allison
[ These are my first pair of wool shorts so I was n't sure what to expect. They are fantastic! I thought that they would attract dog hair( I have 4 pups), and they have n't at all! My only problem is that I 'm kind of a hard fit right now and I did n't want them to be too small so they are a bit too big. But that's completely my fault. Very happy with these and I 'm sure I 'll be buying more.
5
HikeHappy27
[ I bought these shorts over the summer before a big camping trip in the Rockies and Tetons and they held up perfectly. Finally shorts that do n't ride up with any sort of movement and they kept me cool and wicked sweat. The length is perfect in the sense they are not too long or too short. I bought three more colors and these will be the only shorts I will wear now.
5
Teachpam
[ Excellent shorts! Light weight and so comfy. Quality all the way. Snap closure and moisture wicking. Side pockets. Perfect for hiking or any other outdoor adventure. You will love them. Just do it!
$120.00
I 'd like a higher percentage of wool but as it is they 're pretty nice! ... Sometimes I need a size large in shorts but the mediums fit great. ... [ Well constructed, fabric feels and moves
5
Shift
[ The Shifter II Shorts feel great every time I put them on. They are snug with the drawstring around the waist and very baggy through the legs. The pockets are big. The Shifter Shorts clean up easily by hand or machine and hang dry quickly.
5
RogerB
[ Great fit and super comfortable to hang out or post exercise. I wish more colors were available. Thickness is just right even in the heat of summers in Phoenix.
5
Tom
[ Well constructed, fabric feels and moves great. Sometimes I need a size large in shorts but the mediums fit great.
5
Heff
[ I wear Merino wool shorts during week long bike tours. I find that other materials become too stinky. I was n't sure if the blend would hold up the same as 100% but I 've been satisfied so far.
4
Nick
[ To begin, I had to size up to an XL in these... and I normally wear a medium! They are unfortunately a bit shorter than I like, as a straight guy, but the sizing up twice helps with this a bit. The crotch also is much higher than I 'm used to in shorts like this( coming from lululemon). That all said... I love the material. I 'd like a higher percentage of wool but as it is they 're pretty nice! Have bought two more pairs from another retailer.
$29.97-$34.95
WAS: $35.00*
All the amazing benefits of merino wool with the most comfortable fit. ... I got these to try for every day use ro stay warm and comfortable in the cooler months and I am pleased with my
5
JMBURNS
Bought them cause there cool, love em cause there comfy. My wife cant keep her hands off them. but that's just cause she does the laundry...
5
Dan M
[ The best underwear! Just cant beat these. All the amazing benefits of merino wool with the most comfortable fit. Comfy but also offers support.
5
Michael
[ Purchased three pairs for hiking. Wicks moisture and are very comfortable during hot hikes. I 'm 6' 3 '' 215lbs and the medium size is a great fit.
5
Guardian
[ I took a long backpack trip and got some redness on my typical polyester undergarments so I bought these, but have n't backpacked with them. I wore them for my typical day of work and they felt good. I am about 33 inch waist and medium fit as suggested. Will update if I find these do n't work better than my typical garments.
5
JTUUK
[ I 've had a few pairs of these. The nicest thing about them is no matter how sweaty or wet they get you 're always able to walk them dry, and it takes a few days before they get funky.
$95.00
Most comfortable running shorts I 've ever worn ... [ Lightweight, breathable, durable. ... If you 're looking for lightweight, odor- resistant training shorts that can handle heat and movement, these are worth
5
dom
[ Expensive for the amount of material used but very comfortable and has good airflow.
5
ib_fan
Was not sure how I 'd like the shell fabric but after a couple runs and workouts, I can report back that these shorts are light, comfortable and super breathable. Wo n't go back to synthetics!
5
RogerB
[ Great road or trail shorts. Super soft and comfortable. The fit is spot on, not to baggy or to tight. For trails more storage would be great. The liner is comfy too.
5
ausius
[ Great shorts to run in, especially when it's hot and humid. I like them so much that I bought a second pair. They dry very quickly.
5
Jeff
[ I 'm a long time college and professional runner and I 'm always trying to find sustainable workout clothes. These shorts are non- toxic, all natural, sustainable, and most importantly perform great day after day!
$70.00
Smart to wear wool ... They fit perfectly, and the material is soft and smooth. ... [ Love their socks, expanded into shorts in the heat of the summer. ... [ I may have to get more of these terrific
5
Outdoor Bob
[ I may have to get more of these terrific shorts. They fit perfectly, and the material is soft and smooth. I didn ’ t even know Smartwool made shorts!
5
Sweet dad
[ Love their socks, expanded into shorts in the heat of the summer. No problem! Not sure what I may explore next but will search on for it on mooseejaw
$95.00
Nevertheless, the fit is very comfortable and they are great for low- impact activities. ... They are still very comfortable and I will purchase these shorts again and
5
MamaBear
I like these shorts because they are well made, comfortable, fashionable, and perfect for my needs.
5
Erin
[ These are the most comfortable athletic shorts I 've ever worn. They are soft, light, and- bonus- flattering.
5
Eva
[ These are really comfortable, true to size, I love the back pocket for my cell phone
5
Coyote
[ I appreciate that these shorts are not made with synthetic fibers because the air does flow through the fabric to cool you down when running in high temperatures. What a relief that is. They are my favorite running shorts of all time now. I bought both colors and they are gorgeous. The waistband is so comfortable which is a huge plus for me. They are a little bit low rise if you are tall like me. They could have a bit of a longer rise for us tall girls but they 'll do. They are still very comfortable and I will purchase these shorts again and again. They are true to size. I always wear medium in running shorts and its the same with these shorts.
5
J9
[ I wanted shorts with built in liner for around the house and running errands. These meet those needs. Comfy and soft.
Merino wool bottoms offer excellent insulation while remaining lightweight, making them ideal for layering in cold weather. They are naturally moisture-wicking, helping to keep you dry and comfortable during physical activities. Additionally, merino wool is breathable and odor-resistant, providing comfort for extended wear.
Yes, merino wool bottoms are highly suitable for outdoor activities such as hiking, skiing, and camping. Their thermal properties help regulate body temperature, while their moisture-wicking capabilities keep you dry during strenuous activities. The softness of merino wool also ensures comfort against the skin, making them a popular choice for active individuals.
Merino wool bottoms typically offer superior breathability and moisture management compared to synthetic options. While synthetics may dry faster, merino wool provides natural temperature regulation and odor resistance, making it more comfortable for long-term wear. The choice between the two often depends on personal preference and specific activity needs.
When selecting merino wool bottoms, consider the weight of the fabric, as lighter weights are better for active use while heavier weights provide more warmth. Additionally, look for features like flatlock seams for comfort and fit, as well as the intended use, whether for casual wear or high-performance activities. Lastly, pay attention to the fit to ensure optimal layering.
Yes, merino wool bottoms can be worn in warmer weather due to their breathable nature. They help regulate body temperature by wicking moisture away from the skin, keeping you cool and comfortable. Lightweight merino options are particularly effective for this purpose, making them versatile for various climates.
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