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Smartwool Classic All-Season Merino Base Layer Long Sleeve for Men Medium Black

SKU: SMTCACBKM MFR: SW0169520011 M
$90.00

Key Features

  • Stay comfortable in any season with this lightweight Merino wool base layer top.
  • Experience superior moisture-wicking and breathability during high-intensity activities.
  • Enjoy all-day comfort with the slim fit design, perfect as a base or single layer.
  • This Merino wool long sleeve offers natural odor control for freshness on the go.
  • Ideal for cool to warm weather, this versatile base layer keeps you at the right temp.
  • Durable nylon-reinforced Merino wool ensures lasting wear for all your adventures.
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Questions & Answers

Reviews about this item

Review Summary

2025-06-06T20:00:00

Rated 5 out of 5

Get Yourself One!

I love this, perfect fit, comfortable and cozy for all my outdoor adventures.

Kerwin

2025-05-25T20:00:00

Rated 5 out of 5

Love the feel of the wool & fit!

Love the quality & fit! I would buy again.

colleen

2025-05-10T20:00:00

Rated 5 out of 5

absolutely!

Great base layer when it's cold?

Kathleen

2025-04-20T20:00:00

Rated 5 out of 5

I will buy it again.

Excellent base layer!

Kyung

2025-04-18T20:00:00

Rated 5 out of 5

Great ahirt

Love the weight, wear it year round

Sc

2025-04-13T20:00:00

Rated 5 out of 5

I am a loyal customer of Smartwool.

In the Fall of 1975, I had the experience of getting caught in rogue weather in the Eastern Sierra and I developed hypothermia. I have been cold ever since. The Smartwool base layer products are a wonderful way for me to stay comfortable. I have a number different temperatures depending on the situation. For the quality and functionality, the prices are more than fair. I have some pieces that are 20 years old and have not shown any appreciable wear or tear.

Michael

2025-04-08T20:00:00

Rated 5 out of 5

this is a great shirt very well made

Love this shirt love the colors very comfortable very well-made and love the hood!!!

Michael

2025-04-06T20:00:00

Rated 5 out of 5

Great shirt!!!

My husband loves this shirt. It's light enough to wear year round! I would buy this product again.

Tammy

2025-04-04T20:00:00

Rated 5 out of 5

Yes

My favorite base layer perfect for XC, cycling, running.

John

2025-04-02T20:00:00

Rated 5 out of 5

I would buy this product again

Great shirt love it wear it all the time

Michael

2025-03-23T20:00:00

Rated 5 out of 5

Would recommend

Always love smartwool base layers. I use them for camping and always stay warm. They fit well and are excellent quality.

Katie

2025-03-19T20:00:00

Rated 5 out of 5

Worn it, wearing it, will wear it for years to come!

This shirt is my favorite for those in-between days when I need more than a T-shirt but lighter than a jacket. I've worn it for years, and it's perfect from fall to spring!

Elizabeth

2025-03-15T20:00:00

Rated 5 out of 5

Great base layer.

Comfortable well fitting top worn comfortably under a light sweater.

David

2025-02-19T19:00:00

Rated 5 out of 5

Great for Skiing

Works great for skiing and I like it better than polyester. Great to get this on sale.

Max

2025-02-17T19:00:00

Rated 5 out of 5

My favorite go to clothing

Smart wool products that I purchase I use them for outdoor activities and leisure in all types of weather just about every day! Great products

Robert

2025-02-17T19:00:00

Rated 5 out of 5

dress like a sheep

Great baselayer, not itchy at all after a wash. Wish it had thumbholes, but it's also nice that it doesn't get in the way of my watch

Herkus

2025-02-16T19:00:00

Rated 5 out of 5

I do buy this item again and again.

I wear this shirt for year round because it provides sun protection and is comfortable in all temps.

Jeff

2025-02-16T19:00:00

Rated 5 out of 5

I do buy this item again and again.

I have several All-Season merino base layers. They are truly an all year round shirt for me living int he dee[ south, Louisiana. I made this purchase for the color.

Jeffrey

2025-02-04T19:00:00

Rated 5 out of 5

Very pleased on all fronts

I was very pleased with how well they fit. I'm now thinking about buying more when I get enough to pay for them. Thank you so much!

Thom

2025-02-01T19:00:00

Rated 5 out of 5

Best a

All day, all seasons!

Devin

2025-01-27T19:00:00

Rated 5 out of 5

Own this top in 4 colors and will probably get more

I love both the All Season and Classic version of Smartwool's Merino Base Layer tops. I were this alone on warmer days or under a sweater or colder day. Soft. Be careful too avoiding shrinking these tops. After making the mistake of putting it into a dry, I learned to hang dry. It is dry in no time at all.

Michael

2025-01-26T19:00:00

Rated 5 out of 5

Great all season base

Great lighter weight base layer. Wear it under a warmer layer for riding and will be great for camping or need something light weight with sleeves in the summer.

Dan

2025-01-12T19:00:00

Rated 5 out of 5

Long Distance Backpacker Approved!

I've been wearing the All Season shirts for years. I'm 5'10", 170 lbs, 41" chest, 32" waist and the medium fits like it was tailored for me. I wore one for over 1k miles of the PCT and it held up extremely well for a merino shirt. You have to expect thinning with Merino as a natural fiber so adjust expectations, but the benefits far outweigh the shorter life span of a synthetic shirt. They hold their shape under a pack day after day, the nylon core really extends the lifespan and provides the durability without sacrificing the incredible feel and anti-stink that merino provides. It dries quick enough thanks to no spandex content. The only downside worth commenting on is the stitching seams along the shirt will fray pretty bad over time as they rub on the backpack etc. It doesn't effect functionality and I just carefully trim or remove with a fabric shaving device at a setting that doesn't get to close to the fabric, works well. I've been wearing merino for many years from Icebreaker, Ibex, etc and Smartwool has nailed it. If anything, i would suggest experimenting with higher nylon content for added durability, maybe in targeted high-wear areas. I love Smartwool boxer briefs but the crotch wears through eventually while the rest of the boxer had plenty of life. They should be made with 100% nylon breathable mesh and slightly higher nylon content throughout and they would have a gold standard boxer by which all others are measured! Please make them Smartwool

John

2025-01-06T19:00:00

Rated 5 out of 5

Best base layer on the market

This base layer is great for being out in the field clearing trees from the trail especially during cold and wet days. These are comfortable and provide me just right amount of warmth without restricting movement.

Scotty

2025-01-06T19:00:00

Rated 5 out of 5

Great product for anyone working outside or ski

I work construction and this keeps me warm and toasty

Michael

2025-01-03T19:00:00

Rated 5 out of 5

I would buy again.

My boyfriend loved the warmth and fit of this shirt.

Melissa

2025-01-02T19:00:00

Rated 5 out of 5

Warm and lightweight

Very soft and warm as a base layer.

Anne

2024-12-30T19:00:00

Rated 5 out of 5

I will buy again

Use them for biking, hiking, skiing. Any the big outdoors when it gets cold

Domenic

2024-12-26T19:00:00

Rated 5 out of 5

A favorite!

Husband wears it daily! Lightweight but warm and looks great with jeans. Used as a top layer over tee. Second purchase as he loved the first one!

Jan

2024-12-26T19:00:00

Rated 5 out of 5

This is a favorite!

My husband loves this and wears it daily as a top layer over a tee. Soft and warm. Not too heavy or hot for southern winter. Looks great with jeans.

Jan

Smartwool Classic All-Season Merino Base Layer Long Sleeve for Men Specifications

  • Material

    Made in China: 88% Merino Wool, 12% Nylon

  • Fit

    Slim fit

  • Lightweight

    Yes

  • Temp Rating

    Classic All-Season
    Warm: 50 Degree +
    Cool: 25 - 50 Degree

  • Care Instructions

    Wash With Like Colors
    Do Not Iron Decorations
    Do Not Dry Clean
    Cool Iron As Needed
    Tumble Dry Low
    Do Not Bleach
    Machine Wash Warm Gentle Cycle

  • UPC Code

    196247539837

SmartWool Men's Base Layer Long Sleeve Crew Size Chart
  S M L XL XXL
Chest (in) 36-38 39-41 42-44 45-48 49-51
Waist (in) 29-31 32-34 35-37 38-40 41-44
Hip (in) 36-38 39-41 42-44 45-48 49-51
Arm Length (in) 31-32 32-33 33-34 34-35 35-36

About Smartwool Classic All-Season Merino Base Layer Long Sleeve for Men

FEATURED REVIEWS

No Sweat, Finally

By Chuck B.

I have skied with a poly base layer for years, but for some reason given the temperature range on the slopes this year, I found my self in a damp base layer getting chilled. Sean at Christy Sports in Vail suggested Smartwool and I have been delighted with the results. Better wicking, no soggy bone-chilling dampness and comfortable, no itch fit. I will be hiking with this base layer as soon as spring come along

Great product

By Jan

Bought it for my son who loves the Merino wool. It fits well, keeps him warm, its very easy to wash and dry. Couldn't be happier with the product. And it looks great too!

Ultimate Comfort with Classic All-Season Merino Base Layer Long Sleeve
Experience the ultimate in comfort and versatility with the Base Layer Long Sleeve. Perfect for both spring skiing and summer camping, this Merino base layer is designed to keep you comfortable in any season. Made with Core Spun technology, this Smartwool base layer wraps lightweight Merino around a nylon core for added durability while ensuring the soft 100% Merino wool stays next to your skin.

Durable and Comfortable Fit
The men's long sleeve features a slim fit, intended to follow the contours of the body for a snug and comfortable feel. The lightweight Merino jersey fabric uses a recycled nylon core to enhance durability while maintaining the comfort of Merino wool. Smooth flatlock seams minimize chafing, and offset shoulder and side seams lie smoothly beneath pack straps, making this the perfect all-season base layer for any activity.

Advanced Features for Superior Performance
Designed for high performance, this Merino wool base layer includes side seams that wrap to the front for a body-enhancing fit. Made in China from 88% Merino Wool and 12% Nylon (exclusive of decoration), this Smartwool men's base layer combines quality craftsmanship with advanced materials to deliver superior comfort and durability.

Smartwool Classic All-Season Merino Base Layer Long Sleeve for Men Features

  • Core Spun technology for durability and comfort
  • Slim fit follows body contours for a snug fit
  • Lightweight Merino jersey fabric with recycled nylon core
  • Flatlock seam construction minimizes chafing
  • Offset shoulder and side seams for comfort under pack straps
  • Side seams wrap to front for body-enhancing fit
  • Made with 88 percent Merino Wool and 12 percent Nylon
  • Responsibly sourced ultra-soft Merino wool next to skin
  • Perfect for all-season use from spring skiing to summer camping
  • Easy care with machine wash and tumble dry

Warranty Information

This product has a limited warranty of 24 months.

Key Features

  • Stay comfortable in any season with this lightweight Merino wool base layer top.
  • Experience superior moisture-wicking and breathability during high-intensity activities.
  • Enjoy all-day comfort with the slim fit design, perfect as a base or single layer.
  • This Merino wool long sleeve offers natural odor control for freshness on the go.
  • Ideal for cool to warm weather, this versatile base layer keeps you at the right temp.
  • Durable nylon-reinforced Merino wool ensures lasting wear for all your adventures.