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  • The Smartwool Midweight Crew top is made of merino wool to help maintain comfort whether the climate is warm, cold or in-between
  • With a UPF 50+ rating, fabric provides excellent protection against harmful ultraviolet rays
  • Shoulder panels eliminate top shoulder seams, reduce chafing and optimize comfort under pack straps
  • Rear body seams wrap around to front toenhance fit, and sculpted side panels also enhance fit
  • Flatlock stitching eliminates abrasion, increases comfort and enhances fit by reducing bulky seams
  • The Smartwool Midweight Crew top does not itch and will not shrink; machine wash and dry


View all Smartwool Women's Running Shirts

REI membership


Best Use Multisport
Shirt Style Crew
Fabric Merino wool
Sun-Protective Fabric Yes
UPF Rating 50
Moisture Wicking Yes
Underwear Weight Midweight
Sleeve Length Long Sleeve
Gender Women's

Size chart

Rated 1 out of 5 by from NOT a warm under garment anymore So disappointed in this product that I was compelled to write my first review ever. Been wearing and lovin' SmartWool since the company first started up. They used to use a soft merino wool that pampered you like a baby's blanket and warmed you instantly. Now they're using a very finely spun wool that is actually sleek vs soft and keeps the shirt very COOL against the body vs warm. I wore mine for several hours and never did warm up... felt that edgy cold discomfort all day long. Defeats the purpose of long underwear! Have found the Cresta line at llbean to be a good alternative for soft, warm, merino wool products.
Date published: 2015-12-15
Rated 5 out of 5 by from Love it - wore it multiple days Bought this just before my Alaska trip and wore it several days in the row as we were camping and working on a secluded island. With no shower... And yet, like my original smartwool shirt, it kept me both warm and helped keep my feeling less stinky than other shirts.
Date published: 2014-07-25
Rated 5 out of 5 by from Great all around in all but the warmest weather! Very pleased with this item, it works well as a casual top as well as a baselayer. It breathes well and does not absorb odors. I've worn it under my scrubs at work and accidentally got the sleeves wet, they dried within an hour. Smartwool is not cheap, but it is durable, soft enough to wear next to my sensitive skin, and well worth the money. I paid full price and don't regret it. Can't recommend it enough!
Date published: 2015-01-24
Rated 5 out of 5 by from Staple They run on the tighter side, but look and feel terrific. A gift that never fails to please.
Date published: 2013-04-18
Rated 5 out of 5 by from LOVE LOVE LOVE This is one of the best purchases I have ever made. It was pricey. Would have loved to have gotten it for about 25% less, but I love it. It fits well, keeps you warm and looks good doing it. I got the shirt in purple, which is my favorite color and have worn it a ton. It is great for layering, but also just on it's own. Performance gear at it's best. I want to get one for my husband but I'd like to find it on sale!
Date published: 2013-01-31
Rated 5 out of 5 by from Excellent Product I have two of these and wear them all the time - on the mountain, biking to work, around the office. They're warm but breathable so I don't overheat in them. Also, the wool fabric resists odors which is an added bonus. I've heard the lightweight version of these tends to run. The midweights I have have proven to be durable over the past 2 years I've had them.
Date published: 2012-11-16
Rated 5 out of 5 by from I love this top! This is a very versatile top! I love its breathability and warmth. I have used mine layered on cold-weather hikes, and not layered as a casual top around town. I love it so much, I am purchasing another one in a different color!
Date published: 2013-01-10
Rated 5 out of 5 by from Super warm and comfortable I bought this for myself about a month or so ago and I'm so bummed every time it's in the hamper and isn't available to wear! I wear it on cool weather and cold weather hikes (with or without a fleece top layer depending on the temp). Today I wore it to work as a sweater. The dark purple color is beautiful, and this top is soft on my sensitive skin. I am a huge fan of smartwool. It is expensive but it's worth paying for ( I lucked out and got mine on sale.)
Date published: 2012-12-20
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What is the wool thickness "number" like 200, 220, etc. ? 

Asked by: AllyLee
The value of the thread diameter is 250.
Answered by: REIservice
Date published: 2016-11-06

how much does this weigh?

Asked by: I hope I get lost
The Midweight Crew Top weighs 7 ounces.
Answered by: REIservice
Date published: 2015-09-20
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