Description
You can't go wrong with Wirecutter's top pick for the best thermal underwear. Our Aspect Base Layer Long Sleeve Shirt is a "city-to-trail shirt" and Wirecutter's "most versatile pick." They capture what we really love about this base layer top—it's endlessly versatile and the perfect companion no matter where the day takes you. It's soft and cozy against your skin and it keeps you warm, dry and comfortable. Plus it features industry-leading durability thanks to our (m)Force Technology. It has a slightly longer cut so it stays tucked in when skiing or snowboarding, and it has discreet thumb holes. Pair it with our Aspect High Rise Bottoms.
Each Treetop Dye garment is unique with variations in tone from lighter to darker shades.
"It's a versatile layer that handled the transition well from walking around in 30-degree-Fahrenheit temperatures to a hot and crowded house party.” - WIRED Magazine
Product Features
Versatile midweight base layer that's warm but not too warm
Natural, sustainable Merino wool reinforced with (m)Force Technology for increased durability, dry times and recovery
Odor resistant, moisture wicking, sun protective, breathable and temperature regulating
Backpack-friendly raglan construction
Discreet thumb holes that keep sleeves in place when needed
Long cut that works great for layering and stays tucked in
Low-profile flatlock seams
Printed neck label & removable care label
Size M weight: 6.5oz
Fabric Details
84% Merino wool, 16% nylon
Soft 180 GSM (m)Force Merino 18.5M wool
Care: Machine wash on cold, hang dry, do not bleach or dry clean, iron on low wool setting. Learn more.
Sizing/Fit
Amber (in Black) is 5'7" wearing a Small.
Fits as a base layer close to your body
Extra length for more coverage
Sleeve Length (from collar to end of the sleeve)
XS - 28"
S - 29"
M - 30"
L - 31"
XL - 32"
Not sure what size to order? See our size guide.