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Review Summary
2025-03-12T20:00:00
Love this warm base layer. I'm 5'10 145# and the medium fits great, sleeves are plenty long
Catherine
2025-03-02T19:00:00
Love the fabric. I have three other smartwool tops
Jane
2025-03-02T19:00:00
I thoroughly enjoy the 1/4 zip base layers myself and own many, and this was a gift for my sister. She too is very happy with it, especially as these polar vertex weather fronts continue to push down into the US!
Jeffrey
2025-03-02T19:00:00
This is one of my favorite 100% merino tops for a light layer of warmth that doesn't make me sweat. The twilight blue heather is a beautiful color. I own another top like this that has lasted over 6 years and is still in great shape. I can wear a small or medium and opted for Medium this time. This current version is a bit too long on me and I will hem it, but otherwise love this top.
Pam
2025-03-01T19:00:00
Have used this as a base layer on some very rainy hikes with mid-range temps. I was warm but still comfortable going uphill! Was shedding some bits of lint, but that has stopped after a few washes.
Brianna
2025-02-27T19:00:00
Love this shirt! Fits great and looks great with a fun design. Yes, I've considered buying another and would if another color was available.
Elizabeth
2025-02-27T19:00:00
Love the feel, the look, the fit, the colors of this shirt. I bought 3 in various colors. Keeps you warm and isn't too hot on a warmer day. Perfect layering shirt.
Kathy
2025-02-24T19:00:00
I use this top for many activities or just out and about when it is cold with a vest over top. The blue color is gorgeous!
Kathy
2025-02-20T19:00:00
Soft, odor resistant, stretchy, and nice and warm.
Lindsey
2025-02-20T19:00:00
I love my Thermal Merino Base Layer 1/4 zip. The colors were exactly like the picture online and fit perfectly. This is my second 1/4 zip. I also love the Smartwool socks!
Terry
2025-02-17T19:00:00
I had never worn Merino wool base layers before, and they are amazing! I feel neither hot nor cold, and they are incredibly comfortable. The sizing is exactly as described, and I couldn't be happier.
Tammy
2025-02-17T19:00:00
I use this for hiking or just walking the city on cold winter days. When it's 20 degrees and below I wear over a long sleeve Marino wool tee and with my down parka not only is it warm but looks great.
Nancy
2025-02-16T19:00:00
Great as a base layer or stand alone shirt. Love the fit. Sleeves are nice and long. Weight is good, not flimsy. Length is good.
Andrea
2025-02-15T19:00:00
Working out, casual, hiking, working, just relaxing around the house.
Tim
2025-02-15T19:00:00
I love this! Such wonderful quality and SO warm! Perfect layer.
Sheila
2025-02-14T19:00:00
So warm its almost too warm. Perfect fit under other clothes.
Jennifer
2025-02-12T19:00:00
This wool thermal is my favorite layering top for skiing and all other cold weather activities! It is stretchy enough, comfortable, warm and just the right length. The 1/4 zip is helpful too.
Dana
2025-02-08T19:00:00
I love this bra so far. It fits well and does not shift. I have yet to test it on sweaty hikes, but I suspect it will hold up well to the stinkiness like the rest of the smartwool line. Already ordered more
Caroline
2025-02-08T19:00:00
Great under layer for skiing. I was worried it would itch as I'm really sensitive to wool, but this is so soft and caused no irritation.
Lindsey
2025-02-07T19:00:00
I used this as a base layer skiing and it kept me very comfortable and warm without being bulky. Its well. I also could wear it with some jeans and looks nice.
Jan
2025-02-03T19:00:00
My favorite about this thermal is that it has super long sleeves!!!! Was a little pricey but I love it and hope it last a long time.
Lindsey
2025-02-02T19:00:00
Fits true to size. Perfect for my last ski trip. Warm, breathable layer was exactly what I needed. Looks very stylish for apres ski. My best ever smart wool purchase (and I've made a lot of them).
stella
2025-02-02T19:00:00
I use this under my ski jacket and it perfect just by itself. I love the dip turtleneck because sometimes I do t even have to wear a neck gator. So comfy and warm.
Jill
2025-01-29T19:00:00
So far this product is very good its warm without being bulky its also looks well. Easy on and off.
Anne
2025-01-29T19:00:00
As a petite woman I appreciate the fit. It's not down past my behind like so many tops but covers my hips well. It's a great base layer or I wear alone on warmer winter days. I've got it in two colors and would live more and more patterns.
Lynette
2025-01-21T19:00:00
Layering this with a close-fitting wicking tee and an outer water-resistant layer is top notch.
Lauren
2025-01-19T19:00:00
I have 6 of these, in 2 sizes. They are in constant rotation in my wardrobe whether I'm at home, doing chores, hiking or snowshoeing , rucking or just walking my dog. Love that they are 100% merino, long wearing and hold their shape with repeated use and laundering. Definitely one of my faves!
Tami
2025-01-18T19:00:00
Love it!! Perfect for cold days. Looks very polished. Great soft material and easy to care for. I am 5"4, 125 pounds and I got a medium and it is perfect for wearing a shirt underneath.
Joanna
2025-01-15T19:00:00
These are my mother-in-laws favorite shirts. They're lightweight but also will keep you warm if the air is breezy.
Kristen
2025-01-13T19:00:00
Love wearing this longunderwear top for skiing and snowshoeing. Feels great, keeps me warm.
Sally
100% Merino Wool
Slim
Machine Wash Warm Gentle Cycle.
Do Not Iron Decorations.
Do Not Bleach
Tumble Dry Low
Cool Iron As Needed
Do Not Dry Clean
Wash With Like Colors
Center front zip: 8" (20cm)
8.32 oz (236g)
193392656631
XS|2 | S|4-6 | M|8-10 | L|12-14 | XL|16 | XXL|20-22 | 3XL|24-26 | |
---|---|---|---|---|---|---|---|
Chest (in) | 32-33 | 34-35 | 36-38 | 39-40 | 41-42 | 46-48 | 50-53 |
Waist (in) | 24-25 | 26-27 | 28-30 | 31-32 | 33-34 | 39-42 | 43-46 |
High Hip (in) | 31-32 | 33-34 | 35-36 | 37-38 | 39-40 | 41-44 | 45-49 |
Hip (in) | 35-36 | 37-38 | 39-40 | 41-42 | 43-44 | 48-51 | 53-56 |
Arm Length (in) | 27-28 | 28-29 | 29-30 | 30-31 | 31-32 | 31-33 | 31-33 |
Plan To Buy Lots of These!
By Sarah
I have multiples and wear them every day during the winter in Colorado
At least this one thing is still 100% wool
By Me
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 clothing options seem to be trending away from the 100% wool option. Bummer !! I'm attempting to gradually change my wardrobe over to 100% natural fibers, and thought I could count on Smartwool as a pl...
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SmartWool has updated the fit of Women's Merino 250 Base Layer 1/4 Zip to improve functionality while also enhancing aesthetics. As one of SmartWool's heaviest base layer tops and one of SmartWool's best base layers for cold weather, this garment uses 100% responsibly sourced Merino wool, shoulder panels, and a flatlock seam construction to help minimize chafing as well as keep you comfortable and temperature regulated as you enjoy high-intensity skiing, hiking, running, and more.
Benefits
Merino 250
This heavier, soft, 100% Merino wool fabric offers breathable warmth, moves sweat away from the body, and provides next-to-skin comfort in colder conditions
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