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Men
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Collections New Arrivals Pursuit Ultralight Sun Protection 100% Merino Wool Aspect Base Layer 180g Inversion Base Layer 270g Underneath It All Merino Wool + Tencel Clearance
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Men's Aspect Midweight Merino Wool Base Layer Long Sleeve Shirt in Black
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Men's Aspect Midweight Merino Wool Base Layer Long Sleeve Shirt in black on a studio model
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Men's Aspect Merino Wool Base Layer Long Sleeve Shirt in Terra Cotta
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Men's Aspect Base Layer Long Sleeve Shirt in Charcoal Heather Black
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Men's Aspect Midweight Merino Wool Base Layer Long Sleeve Shirt in Cement Spray Dye
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Men's Aspect Merino Wool Base Layer Long Sleeve on a studio model with matching Aspect Bottoms
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Men's Aspect Merino Wool Base Layer Long Sleeve on a studio model with Aspect Bottoms
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Men's Aspect Merino Wool Base Layer Long Sleeve on a studio model with coordinated Aspect Bottoms
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a man wearing an Aspect Base Layer Shirt and a ball cap
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a man wearing Aspect base layers in black from the back
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a man hiking in an Aspect Base Layer Shirt
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a man and a woman hiking in Aspect Base Layer Shirts
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a man splitboarding in an Aspect Base Layer Top
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a man splitboarding in an Aspect Base Layer Shirt
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a man splitboarding in an Aspect base layer shirt
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a man puts on sunscreen wearing an Aspect base layer top
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Men's Aspect Midweight Merino Wool Base Layer Long Sleeve Shirt in Black
Men's Aspect Midweight Merino Wool Base Layer Long Sleeve Shirt in black on a studio model
Men's Aspect Merino Wool Base Layer Long Sleeve Shirt in Terra Cotta
Men's Aspect Base Layer Long Sleeve Shirt in Charcoal Heather Black
Men's Aspect Midweight Merino Wool Base Layer Long Sleeve Shirt in Cement Spray Dye
Men's Aspect Merino Wool Base Layer Long Sleeve on a studio model with matching Aspect Bottoms
Men's Aspect Merino Wool Base Layer Long Sleeve on a studio model with Aspect Bottoms
Men's Aspect Merino Wool Base Layer Long Sleeve on a studio model with coordinated Aspect Bottoms
a man wearing an Aspect Base Layer Shirt and a ball cap
a man wearing Aspect base layers in black from the back
a man hiking in an Aspect Base Layer Shirt
a man and a woman hiking in Aspect Base Layer Shirts
a man splitboarding in an Aspect Base Layer Top
a man splitboarding in an Aspect Base Layer Shirt
a man splitboarding in an Aspect base layer shirt
a man puts on sunscreen wearing an Aspect base layer top
Home/All Products/Men's Aspect Midweight Merino Wool Base Layer Long Sleeve Shirt

Men's Aspect Midweight Merino Wool Base Layer Long Sleeve Shirt

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Description

As Wirecutter's top pick for the best thermal underwear, the Aspect Base Layer Long Sleeve Shirt is "a city-to-trail shirt" and their "most versatile pick." They capture what we love most about this base layer—it's incredibly versatile, incredibly comfortable and works well no matter where the day takes you. It feels great on your skin and keeps you warm, dry and comfortable, plus it has industry-leading durability. It's cut long to stay tucked in when skiing, and it has discreet thumb holes to keep your sleeves in place. Pair this shirt with the Aspect bottoms in full length or 3/4 length.

Product Features
  • All the benefits of Merino wool: resists odor, wicks moisture, protects from the sun, breathes well and regulates temperature
  • Natural and sustainable Merino wool reinforced with (m)Force Technology for increased durability, dry times and recovery
  • Versatile mid-weight base layer that's warm but not too warm
  • Flatlock seams
  • Backpack-friendly raglan construction
  • Discreet thumb loops keep sleeves in place when needed
  • Printed neck label
  • Removable care label
  • Long cut for layering that stays tucked in

Fabric Details
  • 84% Merino wool, 16% nylon
  • Soft 180 GSM (m)Force Merino 18.5M wool
  • Size M weight: 8.3oz

Care: Machine wash on warm or cold, hang dry. Do not bleach or dry clean. Iron on low wool setting. Learn more.

Sizing/Fit

Joey (in Bark Camo and Terra Cotta) is 6'2" wearing a Large. Nate (in Cement Dye) is 5'11" wearing a Large. Danila (in Black) is 5'10" wearing a Large.

  • Fits close to the body
  • Extra length for more coverage

Not sure what size to order? See our size guide.

Men's Size Guide


Finding the right size. The measurements below refer to body size, not garment dimensions (with the exception of the specs marked actual garment measurements). If you're between sizes, either size down for a tighter fit or up for a looser fit.
Our Size  Chest Waist Inseam
36"
29"


S 38"
31" 30-31"
39" 32"
M 41" 33" 31-32"
42" 34"
L 44" 35" 32-33"
45" 36"
XL 48" 38" 33-34"
49" 39"
XXL 51" 41" 34"

Looking for the inseam length? Refer to the product page to find out.

HOW TO MEASURE:

  • Chest — Measure under your arms around the fullest part of your chest.
  • Waist — Measure around your natural waistline.
Actual Garment Measurements (listed on select product pages)
  • Sleeve Length — measured from the collar (at the highest shoulder point) to the sleeve opening
  • Body Length — measured from the highest shoulder point (at collar/shoulder seam) to the hem
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Description

As Wirecutter's top pick for the best thermal underwear, the Aspect Base Layer Long Sleeve Shirt is "a city-to-trail shirt" and their "most versatile pick." They capture what we love most about this base layer—it's incredibly versatile, incredibly comfortable and works well no matter where the day takes you. It feels great on your skin and keeps you warm, dry and comfortable, plus it has industry-leading durability. It's cut long to stay tucked in when skiing, and it has discreet thumb holes to keep your sleeves in place. Pair this shirt with the Aspect bottoms in full length or 3/4 length.

Product Features
  • All the benefits of Merino wool: resists odor, wicks moisture, protects from the sun, breathes well and regulates temperature
  • Natural and sustainable Merino wool reinforced with (m)Force Technology for increased durability, dry times and recovery
  • Versatile mid-weight base layer that's warm but not too warm
  • Flatlock seams
  • Backpack-friendly raglan construction
  • Discreet thumb loops keep sleeves in place when needed
  • Printed neck label
  • Removable care label
  • Long cut for layering that stays tucked in

 

Fabric Details
  • 84% Merino wool, 16% nylon
  • Soft 180 GSM (m)Force Merino 18.5M wool
  • Size M weight: 8.3oz

Care: Machine wash on warm or cold, hang dry. Do not bleach or dry clean. Iron on low wool setting. Learn more.

Sizing/Fit

Joey (in Bark Camo and Terra Cotta) is 6'2" wearing a Large. Nate (in Cement Dye) is 5'11" wearing a Large. Danila (in Black) is 5'10" wearing a Large.

  • Fits close to the body
  • Extra length for more coverage

Not sure what size to order? See our size guide.