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Thermajane Womens Thermal Underwear

  • Based on 45,646 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon

Arrives Wednesday, Jul 22
Order within 6 hours and 31 minutes
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Size: XX-Small


Color: Navy


Description

Our thermal tech keeps you toasty warm. Fleece-lined and crafted with top- notch materials for all-day ease. Move freely with our 4-way stretch tech. Stay fresh and comfy with moisture-wicking fabric.

Package Dimensions ‏ : ‎ 12.95 x 9.57 x 2.28 inches; 1.21 Pounds


Department ‏ : ‎ womens


Date First Available ‏ : ‎ June 30, 2017


Product Warranty: For warranty information about this product, please click here


Best Sellers Rank: #60,963 in Clothing, Shoes & Jewelry (See Top 100 in Clothing, Shoes & Jewelry) #9 in Women's Thermal Underwear Sets


#9 in Women's Thermal Underwear Sets:


Customer Reviews: 4.6 4.6 out of 5 stars (45,646)


Brand Name: Thermajane


Global Trade Identification Number: 99


Manufacturer: Thermajane


Number of Items: 1


Package Quantity: 1


Age Range Description: Adult


Style Number: J-T-W-1836


Manufacturer Part Number: J-T-W-1836


Unit Count: 1 Count


Item Type Name: Base Layer Set


Fit Type: Regular


Sleeve Type: Long Sleeve


Neck Style: Crew Neck


Apparel Closure Type: Pull On


Material Type: Polyester


Fabric Type: 92% Polyester, 8% Spandex


Product Care Instructions: Machine Wash


Color: Navy


Pattern: Solid


Collection Name: Fall/Winter


Style Name: Crewneck


Size: XX-Small


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Jul 22

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Great item, Great price
I originally bought these to take to Ireland with me, because Ireland is always cold and damp. Sadly, we never made it there. Now we are having the coldest winter in the Northeastern United States, and I (finally) took them out of the drawer. Please know that these are so warm and comfortable. The insides are nice and soft up against my skin, while the outside is smooth and slick. This lets you move around without any material binding or bunching. The material stretches with me and does not pull. It feels like a second skin. There are seams in the usual places, but they do not interfere with movement. I am 5'3" and 150 lbs. I ordered the extra-large and it fits me perfectly. I purchased the gray color, but it's nice to see they offer such a great selection of colors. I would definitely buy again. Thank you. ... show more
Reviewed in the United States on February 7, 2026 by JS

  • Looking for Long John's? These are EXACTLY what you want!
Size: Small Color: Navy
I am relatively a hot (temperature wise) person. I absolutely hate long sleeve shirts and I'll walk around with a tank top under a cardigan all winter. I've NEVER owned a pair of long John's in my entire 44 years of life. But last week I started experiencing cold biting through the arms of my cardigan INSTEAD of having to remove it because I'm sweating. I started getting so cold I couldn't get warm enough to fall asleep. After layering some pajama bottoms under my VS leggings and feeling that they were so tight like I was going to puke every time I sat down, I decided to get an Amazon and find myself my first pair of long underwear. My hopes and expectations were low. I searched and read, searched and read and searched some more. Everything I've ordered lately, I've had to send back and replace with a smaller size. I am super picky about my regular clothing and feel like every pair of jeans or leggings never fit in between my legs right. I'm constantly pulling up at my waistline so I don't look like a toddler with a full diaper. But I HATE that feeling when your clothes restrict your movement, or move down EVERY time you do ANYTHING. I didn't know what to expect, and after putting multiple items in my cart and taking them out I ended up with this set in a smaller size than Amazon recommended in the color navy. Did I prefer a lighter color to wear under lighter clothes? Sure, but navy was the only option that could be at my door, literally later that day. I was done with being cold. I was prepared to be disappointed.... not to mention I would STILL be cold so my hopes were down. I don't know who designed these for women, but I am your number 1 super fan. I've never put something more comfortable on my body in my entire life! They are form fitting without being even the slightest bit tight. The bottoms feel like a regular pair of leggings... except somehow LIGHTER and there was little to no extra fabric, yet somehow just enough to cover all the space in between the top of my socks to right at my belly button. The fabric, which seems to be the same in and out is SO SOFT it feels like my whole body is being hugged by the lightest and fluffiest cloud. The top, let me tell you, I think my biggest hatred of today's clothing is that EVERYTHING seems to be working it's way more towards a crop top. I was pleased to put the top on and have the bottom sit way well below my underwear. I can't express how happy I am to have gotten these on my first try. I literally haven't taken them off since I got them yesterday. Not only have they held there stretch... I am staying at a very nice and warm temperature. Definitely NOT cold... but even if I get a little hot this fabric doesn't hold the hot in. This is EXACTLY what I needed and was looking for. I would recommend these to any woman and they will be the only brand and kind of long John's ill recommend... like ever. Now I'm just not looking forward to having to wash them. I guarantee I'll be putting them right back on! ... show more
Reviewed in the United States on December 12, 2024 by Christina Howard

  • Warm, Comfortable, and Surprisingly Versatile Base Layer
This is my fourth ThermaJane set! After multiple washes, the material has held up well—no pilling, shrinking, or loss of softness so far. I wash on cold and dry (I’m a busy mom) and it still looks and feels new. If I had to note one small consideration, it’s that the fleece lining does make these warmer than lightweight thermals, so they’re best suited for genuinely cold weather rather than mild temps. For winter, though, that’s exactly what I want. I get cold easily so these are a perfect warm and lightweight layer. Overall, this is a well-made, comfortable, and practical thermal set that delivers on warmth without sacrificing comfort. I’d confidently recommend it to anyone looking for reliable cold-weather layers or a cozy winter pajama option. Check out the youth sizes for kids too! ... show more
Reviewed in the United States on February 12, 2026 by Melody C.

  • Pretty darn good for mild winters
True to size (since I'm 5'3" I can usually squeeze into a medium by sheer will, but prefer to buy a large for a proper fit and this large fit me perfectly; for reference I'm a size 8-10/fluctuating). The top was longer than I expected based on the other reviews stating it was short. Mine tucks into the pants and then some, possibly because I ordered my actual size myself, rather than the size I can squeeze into. ;-) If you have extra weight on top, or have a larger bust, definitely consider going up a size. Super soft and extremely comfy, and they fit perfectly under my tight jeans. The trim detail at the neck and the fabric look cute peaking out from under my tops. Pretty warm in 40-ish degrees; and in 20-30 degrees with snow flurries, I felt warmer than not wearing them obviously, but was definitely feeling the chill and wind. Overall, I'm not sure how these keep the Minnesota ladies toasty warm, but they will do for milder winters like 20-50 (hey, 50 degrees is nuclear winter if you're nearer to the equator). I am from warmer climates myself and this is the coldest winter I've experienced in more than 25 years (just moved to Oregon), so I also feel colder than your average snow-treading Oregonian for sure. I personally think they feel great on the skin (so silky), but they aren't flattering enough to wear alone around other humans unless you have a pretty sweet, rockin' bod. Look away, look away! Overall, 4 stars and I would buy them in more colors. ... show more
Reviewed in the United States on December 15, 2016 by AJB

  • Comfortable and soft
Size: Large Color: Black
I was trying to hold back and wait until I actually wash them before I left a review because I saw some “after washing” reviews that concerned me, however, I am so impressed with these long Johns, that I had to share my first impression. They are silky soft, fitted but not tight and suffocating. I put my black slacks over them to see if I felt like it was too suffocating but they were super cozy. I will wear them on a plane to Berlin! The top was not restricting. It was tapered enough on the bottom half of the shirt, so that air does not enter but still not tight against the skin and left room for stomach area. The description or someone’s review said something about feeling just like silky skin on top of yours like another layer of skin and that’s exactly how it feels on me. No need for a picture because it fits exactly like the picture but with a different body dimensions. I ordered a Large. I am 5’1”, bust size is 38D or 36DD . My pants size is normally about a size 8. I find this to be the perfect fit for me. I normally have trouble finding a comfortable top but this did not suffocate me. I also have trouble with pants because I have a higher and round buttocks. Both top and bottom were very comfortable. Please keep in mind that I have not washed them yet. I don’t care because its initial impression was very positive on a picky person. ... show more
Reviewed in the United States on January 8, 2025 by L. Leach

  • Favorite base-layer thermals
Love these base-layer thermals, navy was my third pair. I wear these under ski pants skiing when temps are below 32 and also as just a base-layer under thinner pants around the house when weather starts getting cool. I would call them a mid-weight not too thick but not thin either. Feels so soft, comfy, and stretchy but doesn't stretch out after wearing. Good quality, they have held up well washing and drying on low. Took 3 years for my first pair to even start showing signs of thread in waist seams coming loose. Hope the black color comes back in stock soon. ... show more
Reviewed in the United States on November 14, 2025 by WeShopWeBuyCADreaming

  • Super warm and cozy
Size: Large Color: Black
Love these long johns! They are so warm and cozy. I love that they’re thin enough to be worn under most of my clothes but they still keep me warm. They fit well and snug, but not too tight. Good quality fabric that is silky on the outside and almost like a down material on the inside. Really good value, considering how often I wear them. ... show more
Reviewed in the United States on December 15, 2025 by Skye

  • Great, lightweight, spongy fluffiness (feeling, not material) to the inside Great, lightweight, spongy fluffiness (feeling, not material) to the inside
Update: have worn this twice in total and there’s a small hole in the crotch. Quality control is lacking, knocking down another star simply because of it. Does the job of keeping me warm, but come on. Paying almost $35 for a set of undergarments and already having issues with stitching is ridiculous. ***Note that this arrived last night 12/28 and I put them on this morning 12/29 and there’s already hole in the top as mentioned with the picture… Don’t really like that for the price, as it has me questioning how long these will last. First impressions seemed great though. Would’ve given it 5 stars otherwise. Can be worn under clothes without show, they’re perfect for winter or even just having it place of pajamas or wearing warmer clothes.. you feel naked (big plus from me, I don’t like how clothes feel) with a layer of warmness on your skin and it feels sponge-like. Press down on the soft side of a sponge or even better: a Mr clean magic eraser (more accurate feeling) and imagine a thin layer of that on the inside of the clothing covering your whole body, that’s what I mean. Plus the warmth. Good stuff. I’m a thicker woman, short, ordered a Large and it fits like a glove. Will definitely be ordering more. ... show more
Reviewed in the United States on December 29, 2024 Reviewed in the United States on December 29, 2024 by Mary S

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