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Classic Thermal Long Sleeve Merino Wool Base Layer T-Shirt video
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Classic Thermal Long Sleeve Merino Wool Base Layer T-Shirt

Smartwool

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SOLD OUT

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Details & care

One of the brand's heaviest base layers, this shirt has flatlock seaming and movement-enhancing construction to keep you comfortable in high-output activities. The merino-wool interlock knit ensures enhanced comfort, breathability, thermoregulation and odor resistance.

  • Crewneck
  • Long sleeves
  • Smooth flatlock seaming designed to eliminate rubbing and irritation
  • Merino wool naturally resists odors and helps regulate body temperature for comfort
  • 100% merino wool
  • Machine wash, tumble dry
  • Imported
  • Item #10518870
  • Core Product ID 333333KQ5F

Size info

  • XS=0-2, S=4-6, M=8-10, L=12-14, XL=16.

Shipping & returns

Free shipping. Free returns. All the time. Purchases made online can also be returned or exchanged at any Nordstrom store, free of charge. Read more about our shipping & returns policies.

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Smartwool

Smartwool was launched in 1994 in Steamboat Springs, Colorado, and initially specialized in performance socks made of Merino wool. Today the company continues to push the boundaries of Merino to create smarter, more capable outdoor apparel from head to toe. Built on the desire to be comfortable outside, Smartwool exists to help people play, live and laugh in the great outdoors.

Reviews

(3)35.0 out of 5
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Sept 21, 2026

A Travel Gem

[This review was collected as part of a promotion.] The color is stunning and the fabric is wonderfully soft and buttery! It’s a fantastic lightweight base layer that is going to be an absolute staple for my wardrobe when I travel to Europe in November. A total capsule wardrobe find! I am 150lbs and 5'3" and I got a medium.
Grace
Aug 5, 2026

Would always recommend

Love Smartwool! Repeat customer- great fit, great durability, great product. These shirts have traveled from Peru to Iceland to Antarctica with me and have not disappointed.
Aimee W.
Aug 2, 2026

Nice weight

Lightweight layer if the days warms up, but warm enough to stay warm if the conditions are between temperatures.
Peg D.