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

SKU: SMTCAC

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Reviews about this item

Review Summary

2025-12-01T19:00:00

Rated 5 out of 5

I would definitely buy this again!

My husband loves this base and wears one under his sweatshirt every day.

Mary

2025-11-01T20:00:00

Rated 4 out of 5

Wonderful piece of clothing

I love the feel and fit of smartwool.

Mike

2025-10-05T20:00:00

Rated 4 out of 5

I was really excited for this shirt and it is mostly great!

I read the reviews and others stated that the sleeves would "hole out". I have only wore it a couple of times and there is a small hole in the sleeve. I don't know how it got there.

Trevor

2025-09-20T20:00:00

Rated 5 out of 5

Great product

Use it as an insulating layer

Kevin

2025-09-14T20:00:00

Rated 3 out of 5

Not for me-but may be for others

A bit itchy for me. I bought it for a trip and returned it with no problem. Waiting for the credit to appear on my card.

James

2025-09-09T20:00:00

Rated 5 out of 5

love em.

Wear it a lot, wide heat range. I teach kayaking, cold early, warm afternoons. I have 3 of these.

Mike

2025-08-20T20:00:00

Rated 4 out of 5

Would buy again fo sho

Good fit. Good for hiking. Kinda itchy.

Ian

2025-08-19T20:00:00

Rated 4 out of 5

Expensive and comfortable. Hope it lasts.

Very comfortable. Hope it lasts longer than my last set.

B

2025-08-17T20:00:00

Rated 5 out of 5

Sale Buys

Love the color

Erik

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

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.