Discover unparalleled comfort and quality with this exceptional undershirt, a staple addition to any modern wardrobe. Crafted from 100% Merino wool, this garment offers a snug fit and a classic round neckline, ensuring optimal wearability throughout the day. The interlock fabric enhances breathability, thermoregulation, and odor resistance, making it a versatile choice for various activities and climates. With forward-leaning side seams, this piece elegantly highlights your silhouette, providing a refined and polished look. The inclusion of flatlock seams, along with lowered shoulder and side seams, minimizes friction, enhancing comfort during prolonged wear. Its sleek fit is meticulously designed to follow the body's contours, offering a streamlined appearance that is both stylish and functional. Ideal for men who value both aesthetics and practicality, this undershirt seamlessly combines sophistication with everyday utility. Whether for daily use or outdoor adventures, this garment promises to keep you comfortable and fresh. Elevate your wardrobe with this timeless piece and experience the exceptional qualities of Merino wool, renowned for its natural softness and resilience. Embrace the perfect blend of style, comfort, and durability with this essential undershirt.
Discover unparalleled comfort and quality with this exceptional undershirt, a staple addition to any modern wardrobe. Crafted from 100% Merino wool, this garment offers a snug fit and a classic round neckline, ensuring optimal wearability throughout the day. The interlock fabric enhances breathability, thermoregulation, and odor resistance, making it a versatile choice for various activities and climates. With forward-leaning side seams, this piece elegantly highlights your silhouette, providing a refined and polished look. The inclusion of flatlock seams, along with lowered shoulder and side seams, minimizes friction, enhancing comfort during prolonged wear. Its sleek fit is meticulously designed to follow the body's contours, offering a streamlined appearance that is both stylish and functional. Ideal for men who value both aesthetics and practicality, this undershirt seamlessly combines sophistication with everyday utility. Whether for daily use or outdoor adventures, this garment promises to keep you comfortable and fresh. Elevate your wardrobe with this timeless piece and experience the exceptional qualities of Merino wool, renowned for its natural softness and resilience. Embrace the perfect blend of style, comfort, and durability with this essential undershirt.
in 1 offers
The lowest price for Smartwool Merino 250 Crew Mens Baselayer - Black right now is $112.94 at Oliunìd.
The all-time low was $75.99 on 18 Nov 2025 — today's price is 49% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 25 Apr 2026.
Smartwool Merino 250 Crew Mens Baselayer - Black
Discover unparalleled comfort and quality with this exceptional undershirt, a staple addition to any modern wardrobe. Crafted from 100% Merino wool, this garment offers a snug fit and a classic round neckline, ensuring optimal wearability throughout the day. The interlock fabric enhances breathability, thermoregulation, and odor resistance, making it a versatile choice for various activities and climates. With forward-leaning side seams, this piece elegantly highlights your silhouette, providing a refined and polished look. The inclusion of flatlock seams, along with lowered shoulder and side seams, minimizes friction, enhancing comfort during prolonged wear. Its sleek fit is meticulously designed to follow the body's contours, offering a streamlined appearance that is both stylish and functional. Ideal for men who value both aesthetics and practicality, this undershirt seamlessly combines sophistication with everyday utility. Whether for daily use or outdoor adventures, this garment promises to keep you comfortable and fresh. Elevate your wardrobe with this timeless piece and experience the exceptional qualities of Merino wool, renowned for its natural softness and resilience. Embrace the perfect blend of style, comfort, and durability with this essential undershirt.
Discover unparalleled comfort and quality with this exceptional undershirt, a staple addition to any modern wardrobe. Crafted from 100% Merino wool, this garment offers a snug fit and a classic round neckline, ensuring optimal wearability throughout the day. The interlock fabric enhances breathability, thermoregulation, and odor resistance, making it a versatile choice for various activities and climates. With forward-leaning side seams, this piece elegantly highlights your silhouette, providing a refined and polished look. The inclusion of flatlock seams, along with lowered shoulder and side seams, minimizes friction, enhancing comfort during prolonged wear. Its sleek fit is meticulously designed to follow the body's contours, offering a streamlined appearance that is both stylish and functional. Ideal for men who value both aesthetics and practicality, this undershirt seamlessly combines sophistication with everyday utility. Whether for daily use or outdoor adventures, this garment promises to keep you comfortable and fresh. Elevate your wardrobe with this timeless piece and experience the exceptional qualities of Merino wool, renowned for its natural softness and resilience. Embrace the perfect blend of style, comfort, and durability with this essential undershirt.
Last updated at 25/04/2026 11:59:54
Smartwool M's Merino 250 Baselayer Crew Boxed men's thermal t-shirt-Black-S
Delivery by 5 May $37.95
originally posted on altitude-sports.com
Works fantastic as a thermal shirt and/or regular everyday long sleeve. I now have 3 in different colours. Typically size large 42/44 chest 6'2" and 34 waist. The Large fits perfect and not too tight - arms good length - not too short. Worn on multiple backpacking trips - very durable. Great for outdoor sports and DH skiing. Highly recommend.
originally posted on altitude-sports.com
This is a great baselayer. I added this 250 weight to my collection of merino wool tops. The other one I have is 150 and this one is noticeably warmer. It's great for everyday wear as well as exterior wear. Doesn't have to be a baselayer under other clothes. It also works great for winter biking with a medium weight jacket outside. I got size Medium and it fits my 37 inch chest, 5 foot 8 height.
originally posted on altitude-sports.com
I wear this baselayer directly under my insulated ski jacket (Helly Hansen Alpha 3.0) for downhill skiing. It fits nicely, being trim but not tight. I never feel like it is bunching up underneath my coat. I find this is good under my ski jacket until about -10* to -15* celcius. If colder, I like to add another layer as the chair lift gets chilly.I like Smartwool products and use the 3/4 length baselayer pants and have bought Smartwool products for my wife and kids.
Smartwool M's Merino 250 Baselayer Crew Boxed men's thermal t-shirt-Black-S
Delivery by 5 May $37.95
Works fantastic as a thermal shirt and/or regular everyday long sleeve. I now have 3 in different colours. Typically size large 42/44 chest 6'2" and 34 waist. The Large fits perfect and not too tight - arms good length - not too short. Worn on multiple backpacking trips - very durable. Great for outdoor sports and DH skiing. Highly recommend.
This is a great baselayer. I added this 250 weight to my collection of merino wool tops. The other one I have is 150 and this one is noticeably warmer. It's great for everyday wear as well as exterior wear. Doesn't have to be a baselayer under other clothes. It also works great for winter biking with a medium weight jacket outside. I got size Medium and it fits my 37 inch chest, 5 foot 8 height.
I wear this baselayer directly under my insulated ski jacket (Helly Hansen Alpha 3.0) for downhill skiing. It fits nicely, being trim but not tight. I never feel like it is bunching up underneath my coat. I find this is good under my ski jacket until about -10* to -15* celcius. If colder, I like to add another layer as the chair lift gets chilly.I like Smartwool products and use the 3/4 length baselayer pants and have bought Smartwool products for my wife and kids.
I've long been an unabashed devotee of all Smartwool products but their base layers, like the classic all-season merino long sleeve shirt, is truly the best money can buy. Since my days of living in the frigid mountains of northern Utah, I've discovered the breathability of Smartwool's all-season merino long sleeve base layer makes it both the perfect shirt for keeping warm on winter's coldest days as well as ideal workout apparel. Smartwool base layers also make the best all-season pajamas imaginable. The all-season merino long sleeve shirt feels like a gentle hug when you slip it on, and remains comfortable until you've completed your workout — whether it be a 3-mile hike in the frigid cold or a home gym weight training session. Smartwool has long been the gold ... MoreI've long been an unabashed devotee of all Smartwool products but their base layers, like the classic all-season merino long sleeve shirt, is truly the best money can buy. Since my days of living in the frigid mountains of northern Utah, I've discovered the breathability of Smartwool's all-season merino long sleeve base layer makes it both the perfect shirt for keeping warm on winter's coldest days as well as ideal workout apparel. Smartwool base layers also make the best all-season pajamas imaginable. The all-season merino long sleeve shirt feels like a gentle hug when you slip it on, and remains comfortable until you've completed your workout — whether it be a 3-mile hike in the frigid cold or a home gym weight training session. Smartwool has long been the gold standard for merino wool apparel. When you purchase your first Smartwool product, you'll understand why.
Over the years I've worked in many different outdoor construction settings and heavily rely on base layers.This Smartwool top is easily the most comfortable garment I've worn. It's true to size and warm when outside, yet breathes and doesn't make me sweat if I'm working inside for part of the day.They price tag is slightly hefty but I'm able to wear it multiple times a week when airing it out overnight so it's definitely worth the price tag.I will be buying more in the future.
Such a high quality product that my husband wears his as a stand alone polo shirt as well as an under layer ( as do I because there is no see through). I was initially worried that the wool might be itchy, but that’s not the case. It’s very soft against the skin. I haven’t been brave enough to put it in the dryer on low as the washing directions suggest, so I use a laundry bag with warm water on delicate, then lay the shirt flat on a rack to dry. Perfect every time.This shirt would be ideal for anyone who feels the cold in winter and wants an extra layer under wool & cashmere sweaters or any shirts because the boxed fit is not too tight or loose - it simply curves with the body. Couldn’t be more pleased!
I like Smartwool stuff. I have another 2 of these 250 crew baselayer tops, and I bought a third one in that khaki green (heather?) colour. I specifically bought Smartwool instead of Icebreaker because theirs have neck holes that are so large I call them 'boat necks'. Well, this latest Smartwool top is the same! I complained to Smartwool and they simply sent a canned response 'sorry you weren't happy'. Other than the huge neck opening the top is wonderful, and Altitude Sports delivers on time, their website is well-organized and they occasionally have good sales. I can't fault Altitude at all. But since I wear baselayers for winter warmth I sure don't want large 'sailor-type, boat-neck neck openings.
I was looking for a base layer which wasn't synthetic and found this smartwool which as an almost perfect review on outdoor gear lab website. After a quick research, altitudes sport had it in stock, so I decided to give a try on it. I find it, super confortable and it's my best base layer option for longer travel (weither it's for colder weather canoe camping or bikepacking trips) or everyday life. It's so confortable you will want to sleep in it even if you you had it on all day. I am about 225lbs, 6'1'' with muscular body type and broad shoulder, I wear size large t-shirt and this smartwool shirt fits me perfect with a large, no compression while still being slim fit. I love this 250. Like many reviews are saying, the Smartwool 250 is noticeably thicker and ... MoreI was looking for a base layer which wasn't synthetic and found this smartwool which as an almost perfect review on outdoor gear lab website. After a quick research, altitudes sport had it in stock, so I decided to give a try on it. I find it, super confortable and it's my best base layer option for longer travel (weither it's for colder weather canoe camping or bikepacking trips) or everyday life. It's so confortable you will want to sleep in it even if you you had it on all day. I am about 225lbs, 6'1'' with muscular body type and broad shoulder, I wear size large t-shirt and this smartwool shirt fits me perfect with a large, no compression while still being slim fit. I love this 250. Like many reviews are saying, the Smartwool 250 is noticeably thicker and heavier than the 150 baselayers. The 250 is more like a light or thin wool sweater than a long sleeve t-shirt. Perfect for passive and active wear in colder weather. It keeps you warm if you are stationnary after sweeting. Love it!
This is my second purchase of this item. It's well made, very comfortable (not scratchy in the least), stands up well to washing (good colour fastness). It's not really dressy but fine for casual wear on its own. It is expensive but I feel it's worth it because after a year of use and washing my original is still in good condition and unlike its synthetic rivals it DOESN'T STINK. You can wear this thing constantly for a couple of days (come on, admit it, this happens especially during lock downs) and it doesn't get nasty smelling. When you have over done it (your significant other is probably the best judge of this) wash it and it's back to normal. I find that after a few months the synthetics retain odour and are garbage so no money saved there.
My second purchased in a month, because I love the first (olive green) so much, I had to grab another colour (burgundy) while they're still available.It's a long-sleeve T with benefits. The warmth is perfect for fall and PNW winters, either layered under another shirt or as a top layer over a t. As with any other Merino, these ones regulate your heat and breathe well. Can't possibly own enough of them!Time will tell about pilling of the fabric, but I plan to wash them only as needed (ie not every time I wear them) and hang them to dry. I'm sure they'll hold up to the dryer, but I don't like spending this much on a shirt so I want to baby mine!FIt is great -- I'm a little overweight, but can see this working as a decent shirt on its own because it's not too ... MoreMy second purchased in a month, because I love the first (olive green) so much, I had to grab another colour (burgundy) while they're still available.It's a long-sleeve T with benefits. The warmth is perfect for fall and PNW winters, either layered under another shirt or as a top layer over a t. As with any other Merino, these ones regulate your heat and breathe well. Can't possibly own enough of them!Time will tell about pilling of the fabric, but I plan to wash them only as needed (ie not every time I wear them) and hang them to dry. I'm sure they'll hold up to the dryer, but I don't like spending this much on a shirt so I want to baby mine!FIt is great -- I'm a little overweight, but can see this working as a decent shirt on its own because it's not too clingy. I bought a large, and find the length and arm length perfect. I have oddly long arms for my height and there's no issue with these sleeves!
