
See Options
Review Summary
2025-06-06T20:00:00
I love this, perfect fit, comfortable and cozy for all my outdoor adventures.
Kerwin
2025-05-25T20:00:00
Love the quality & fit! I would buy again.
colleen
2025-05-10T20:00:00
Great base layer when it's cold?
Kathleen
2025-04-20T20:00:00
Excellent base layer!
Kyung
2025-04-18T20:00:00
Love the weight, wear it year round
Sc
2025-04-13T20:00:00
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
Love this shirt love the colors very comfortable very well-made and love the hood!!!
Michael
2025-04-06T20:00:00
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
My favorite base layer perfect for XC, cycling, running.
John
2025-04-02T20:00:00
Great shirt love it wear it all the time
Michael
2025-03-23T20:00:00
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
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
Comfortable well fitting top worn comfortably under a light sweater.
David
2025-02-19T19:00:00
Works great for skiing and I like it better than polyester. Great to get this on sale.
Max
2025-02-17T19:00:00
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
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
I wear this shirt for year round because it provides sun protection and is comfortable in all temps.
Jeff
2025-02-16T19:00:00
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
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
All day, all seasons!
Devin
2025-01-27T19:00:00
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
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
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
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
I work construction and this keeps me warm and toasty
Michael
2025-01-03T19:00:00
My boyfriend loved the warmth and fit of this shirt.
Melissa
2025-01-02T19:00:00
Very soft and warm as a base layer.
Anne
2024-12-30T19:00:00
Use them for biking, hiking, skiing. Any the big outdoors when it gets cold
Domenic
2024-12-26T19:00:00
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
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
Made in China: 88% Merino Wool, 12% Nylon
Slim fit
Yes
Classic All-Season
Warm: 50 Degree +
Cool: 25 - 50 Degree
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
196247539837
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 |
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.
Best Price Guarantee
Shop with peace of mind
Our Customers Love Us!
Read Thousands of Customer Ratings
More About SunnySports