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Description
Smartwool updated the fit of the Women's Classic Thermal Merino Base Layer 1/4 Zip to improve functionality while also enhancing aesthetics. As one of the heaviest base layer tops and one of the best base layers for cold weather, this garment uses 100% responsibly sourced Merino wool, shoulder panels, and a flatlock seam construction to help prevent chafing as well as keep you comfortable and temperature regulated as you enjoy high-intensity skiing, hiking, running, and more.
- Classic 100% thermal merino
- Slim Fit intended to follow the contours of the body
- Moisture management
- Temperature regulation
- Odor resistance
- Merino wool with interlock knit for comfort
- Back body seam wraps to front
- Raglan sleeves
- Flatlock seam construction to minimize chafing
- Size medium center-front zipper: 8" (20 cm)
- Made in Vietnam
- 100% Wool-Merino, exclusive of decoration
Product Reviews
Review Snapshot
by PowerReviews
Most Liked Positive Review
At least this one thing is still 100% wool
Recently purchased a 4th, 250ZipT. LUV them!! My first one is 9 years old, and gets worn constantly, with no signs of wear. Washes great, and doesn't need to be washed often as it never smells bad. But I'd like to comment that I'm disappointed in the Smartwool company overall, because all other ...
Most Liked Negative Review
Used to love this garment
I have purchased one of these tnecks each of the last 6 years. They keep getting smaller and smaller. The one I bought this year is likely my last since it barely accommodates me. Good thing that they are high quality since the 6 I have will likely last a very long time. This is my go to base...
Reviewed by 1091 customers
There's nothing like a smart wool pullover!!
Not sure why reviews are requested just after a purchase but… I bought this to "replace"my favorite 1/4 zip that I've had for 13 years. Love the fit, warmth on cold days, how it's cool on warmer days, light weight for backpacking & how quickly it dries. The last pullover was with me on 58 Colorado 14ers, over 500 miles through the Dolomites and Carnic Alps, over 200 ski days, numerous nights as my PJs for camping, & around town. I remember thinking it was a bit pricey 😂 but clearly worth the money. If you spend a lot of time outdoors & you don't have a wool set, you're missing out. They're life changing!
I'm infatuated with this top!
This is so comfortable for hiking, and it looks great! Washes well, too. Will order again in different colors!
Smart wool soft
Verified Buyer
Comments about G75-Twilight Blue Heather / XL
Nice collar, beautiful color, lightly warm
Favorite shirt!
I love love love this top. I had to buy a few more to be able to rotate them in and out of the laundry.😂
Best Layer Ever.
Best lightweight layer over a short sleeved tshirt, over a thermal long sleeved shirt or on it's own with a vest or jacket on top. I love the snowflake design and will buy it in other colors.
Yes
I purchased these along with the matching bottom to wear as warm pajamas while camping in Utah this spring. The perfect solution.
Great choice for warmth and comfort
My skin is very sensitive to wool but I find this top soft and comfortable to wear. It's warm and close fitting as well as lightweight. I plan to bring it on an upcoming trip to the Arctic. While I mainly plan to wear it as a base layer, it's attractive enough to wear alone.
I have purchased this product over and over again
This base layer is perfect, and I have purchased several over the years. It is an exceptional product, and has been manufactured consistently over many years. That's why I keep buying it and am such a dedicated Smartwool customer.

Official Response by Smartwool, a division of VF Outdoor, LLC
We love hearing from brand fans like you! Thanks for the kind review.
I love this!
I own several of these 1/4 zips in different colors. This time I bought the Pool Blue Joviansphere. It's so vibrant and beautiful. I also have the matching merino base layer crew neck in this style and I love it. Now I can double-down on this awesome style by wearing the 1/4 zip on top of the matching crew neck. The fabric is so comfortable to wear: soft and non-itchy. It's warm but somehow also breathable, and it doesn't hold any odor. Highly recommend!!