Best Women's Thermal Underwear Tops

Machine Wash. Double-layer thermal for warmth in cold weather.
Reviews
Find Best Price at Amazon"They are comfortable enough to sleep in or wear as a first layer under winter clothes. If you like long underwear fairly tight so you can wear another layer on top...without feeling bulky, get your usual size."
"I bought this shirt (Medium size) for my mom, and going to send it to her as a gift ( a week earlier got the same shirt but in S based on reviews, thinking it comes bigger than expected. There is a white brand-name small label on a left sleeve, near the wrist."
"I'm pretty particular about fabrics and neckline--I can't stand anything really tight around the neck."
"I work outside a lot and the thermal works very well and easy to layer over."
"this is a great shirt.. keep an eye on the price.. it changes often .. it's really one of the best of its kind.. keeps my always cold women warm, and it doesn't stay damp if you sweat .. she has 3 of them.. wears them as undershirts."
"Fits good everywhere - shoulders, bust, waist, length, but the arms are about 1-1/2" too short at 5'-7", so I'm either tugging them down a bit or scrunching them up."
"Okay - I am 5'8 and the sleeves were short on me, but I liked that, because the ends of the thermal sleeves did not stick out from my sweater."
"I do think it works to keep me warm; was worried not to order too large; now I wish I had, for despite cold water washing and air drying, I believe it has shrunk...so I would advise getting it one size larger than you need..."

100% Sik.
Reviews
Find Best Price at Amazon"For washing, I throw it in a large lingerie bag so I remember to hang it to dry - which doesn't take long, even in damp cold weather."
"Lovely fabric."
"They are light, so it won't warm you up much, but it is a great first layer."
"If you're actually looking for something to add a layer of warmth, look for a different product."
"It did not add any noticeable warmth to the long sleeved shirt I wore over it."
"They are thin and so comfortable."
"It is keeping me warm in cold Chicago weather."
"Great layer."

96% Polyester, 4% Spandex Bi-Ply.
Reviews
Find Best Price at Amazon"I usually wear size small across different brands, I find the small size of this shirt is a little bit smaller than expected."
"Very warm and well made."
"Purchased this for camping and it fits great and kept me warm at night."
"This is one of the best thermal shirts I now own."
"I had one of these since last winter and was very happy with it."
"Don't know about actual warmth, since I was in a house, but felt warm for the 4 minutes I had it on."
"Its a little small and not as warm as expected but overall it wasnt worth it for the price."
"Got this in the middle of the deep freeze we had."
Best Women's Athletic Base Layers

Machine Wash. Double-layer thermal for warmth in cold weather.
Reviews
Find Best Price at Amazon"They are comfortable enough to sleep in or wear as a first layer under winter clothes. If you like long underwear fairly tight so you can wear another layer on top...without feeling bulky, get your usual size."
"I bought this shirt (Medium size) for my mom, and going to send it to her as a gift ( a week earlier got the same shirt but in S based on reviews, thinking it comes bigger than expected. There is a white brand-name small label on a left sleeve, near the wrist."
"I'm pretty particular about fabrics and neckline--I can't stand anything really tight around the neck."
"I work outside a lot and the thermal works very well and easy to layer over."
"this is a great shirt.. keep an eye on the price.. it changes often .. it's really one of the best of its kind.. keeps my always cold women warm, and it doesn't stay damp if you sweat .. she has 3 of them.. wears them as undershirts."
"Fits good everywhere - shoulders, bust, waist, length, but the arms are about 1-1/2" too short at 5'-7", so I'm either tugging them down a bit or scrunching them up."
"Okay - I am 5'8 and the sleeves were short on me, but I liked that, because the ends of the thermal sleeves did not stick out from my sweater."
"I do think it works to keep me warm; was worried not to order too large; now I wish I had, for despite cold water washing and air drying, I believe it has shrunk...so I would advise getting it one size larger than you need..."
Best Women's Thermal Underwear Sets

The package will include 2 Pieces Fleece Lined Thermal Set (Top & Bottom Ultra Soft and Comfortable. Please order the size refer to the size chart on the left image.
Reviews
Find Best Price at Amazon"When they finally wear out, I will definitely be replacing them because I can't imagine going through a bitter cold winter without them."
"The length of the top and sleeves are kind of short, but the good thing is, this allows me to hide it under any of my jackets/sweaters/hoodies. The waist of the pants didn't give me a loose fit as most size M does, but I didn't feel uncomfortable at all. I wear the bottom underneath my pants a few days ago when it’s lower than 35 F degree outside. They don’t make me feel too hot when I wear them to sleep and with heat open."
"and I anticipated that with 4-way stretch (like the other brands) the Height allowance would compensate for the weight maximum (something designed for taller and slimmer would stretch girth-wise instead to fit shorter and broader). I'm undecided whether to order a bigger size when I return this, but it's obvious that these should be washed before anyone wears because these arrived with the inside of the plastic packaging stained with burgundy dye. I like the rich color and thicker microfleece AND the crotch GUSSET - just wish they fit."
"They arrived with an absolutely horrible smell."
"The bottoms fit much better even though the back waistband kept falling down my backside."
"It came timely and it warm enough for 40s, maybe 30s, under jeans of course!"
"Super soft on the outside and like sweatshirt material on the inside without being too bulky."
"It is a borderline pungent smell that I have never encountered before and I will not be purchasing this item again."
Best Women's Thermal Underwear Bottoms

60% Cotton, 40% Polyester.
Reviews
Find Best Price at Amazon"Size is perfect. If you want them to be snug to wear under clothes in winter, buy your reg size."
"I'm a size small to medium in ready to wear, but always buy the large or extra large in these long johns."
"I live in a cold place and wear a pair of them every single day to keep my knees warm."
"I liked these so much I bought a second pair."
"I am 5'1" , so I ordered a small- it fit perfectly."
"I purchased an extra large because I am a size 16 and it is still too small."
"let's talk about how the sizing chart on amazon was TEN INCHES bigger than the sizing chart on the box."
"I sent them back... too small, uncomfortable, hard feel to the fabric."