Best Thermal Underwear Tops for Women of 2025

"I found the price worthwhile; the material is very good, warm, and snug. It's definitely thick enough for 40-degree weather!"

"The shirts kept me warm all winter. They're soft, lightweight, and form-fitting. They go with any outfit. I highly recommend them!"

"I was impressed with the material and fit. I bought a medium size and wear them constantly while riding my motorcycle. They keep my chest and arms warm from the cold air!"

"I’m thrilled to have discovered these 'old fashioned' waffle weave undershirts. They are warm, comfortable, and exactly what I wanted."

"Despite being a bit snug at first, this top becomes perfectly loose. It’s a good basic top to have, though I wished it was softer."

"I bought this in 4X for comfort since some reviews said it ran small, and it fits comfortably for my measurements, though the shoulders are a bit roomy."

"I work in a gym and bought these to wear under my uniform shirts and polo shirts because it's always cold. I'm thrilled with them! They are extremely warm and fit true to size (a bit tight, which I like). The inside feels soft while the outside has a dry-fit, almost athletic feel. The colors are vibrant and true to the photo. I've washed them a few times, and they've held up well with no shrinkage or fraying. The only minor issue is the collar length; it's a tad longer than I prefer, but I just fold it over and it's perfect! Definitely worth the buy for warm, thick underclothes!"

"I purchased these when the temperatures started dropping since it gets cold where I live in the desert. I wanted to stay warm on my early morning walks without bulky clothing. These shirts under a light hoodie and fleece-lined leggings keep me toasty! The turtle neck eliminates the need for a neck warmer on windy days. However, I found the XXL snug, and while it does prevent jiggling, the upper sleeves feel a bit tight. I'm 5'7”, and the shirt length falls at my belly button, which is okay for layering. I have no regrets buying these; once I start walking, I forget about the snugness. Staying warm on my morning walks is worth it!"

"These tops exceeded my expectations! The weight is just right, keeping me warm and they’re easy to wash and wrinkle-free. In cooler weather, I can wear them as simple tops. I’ve even bought them for family members upon their request, and they’re all thrilled with the warmth and comfort. I’d love to see more colors in this style!"

"I ordered this T-neck as a winter hiking base layer. It’s very comfortable and fits true to size, keeping me toasty warm on an international flight. Perfect for cold hikes, wicking away moisture and retaining body heat. Great product at an excellent price!"

"I love how comfortable these shirts are, keeping me warm while I work from home. The snug fit surprised me positively, and I wear them under sweaters or on their own. Definitely recommend!"

"I’m really in love with these longjohns! They fit perfectly and are super soft, keeping me warm inside and outside without overheating. I bought five more!"

“I love the soft fabric and how it keeps me warm and comfy. I’ve purchased five of them because of the great price and quality!”

“These tops are truly wonderful. They are warm, soft, and perfect for layering. A definite must-have in my wardrobe!”

“I enjoy wearing these as tops throughout winter. They are thin enough for layering but still keep me warm in the frigid mornings. My only issue was with the delivery, as they arrived one by one.”

"I took these on a winter trip to the Arctic Circle and was worried they wouldn't be as warm as the Merino wool ones recommended to me for breathability. However, I ended up loving these! They are super soft and warm, fitting perfectly under layers without being too tight. I'm really happy I bought them—my new favorite baselayers!"

"I absolutely adore these shirts! I bought them for warmth at the gym, but I love them so much that I wear them with my jeans too. They are warm, soft, and comfy. I'm definitely going to buy more!"

"I ordered this for my trip to New Zealand and decided to size up, which was a great choice because these shirts are quite form-fitting. They are warm, comfortable, and perfect for layering!"

"I find these tops incredibly comfortable. The fabric is thin yet warm, which is exactly what I needed. They are a bit clingy, perfect for underwear, but I had to size up for a better fit. Now, they are just right and definitely worth the investment."

"I really enjoy these for winter wear. They are thin but stretchy and provide just the right amount of warmth without overheating. I can wear them alone or layered, and they offer a snug fit. I recommend ordering your normal size for the best fit."

"These shirts are perfect for wearing under other clothes on chilly days. That thin layer adds warmth, allowing me to stay comfortable in cooler weather. They wash well and maintain their appearance nicely over time."

“I’ve been really impressed with these thermal shirts. I bought them to help me stay warm during my night shifts, and they’ve done just that. The material is thick yet lightweight and fits me perfectly. I even ordered more because I loved them so much!”

“Being someone who is always cold, I decided to try these shirts under my hoodies at home. I absolutely adore them! They’re super soft inside and really keep me warm. Plus, they wash well and fit true to size.”

“I live in the Midwest, and winters can be brutal. I got these to wear as long underwear, and they are incredibly comfortable and warm. They do add a bit of bulk, but it’s not overwhelming. The price is definitely reasonable at about $8 per shirt.”

"I bought this to wear in bed, under my heavy long sleeve tees, as there's a draft from the window. It's not as warm as I expected, so I ordered another to layer over it. It is a bit short to the waist for my height at 5'3", but the sleeves fit perfectly, which makes me really happy! Overall, it's very comfortable. I usually wash before wearing, but I made an exception this time. I'm sure it will get even softer."

"As someone who uses thermals as pajama tops, comfort is essential for me. Unfortunately, these were too tight and not thick or soft enough."

"This thermal top is just okay. It’s a thin layer but does help keep me warm on a chilly day, so it works as a base layer. Initially, it was a bit itchy, and I think it needs a few washes to soften up. After wearing it for a few hours, I got used to the fabric. The fit is flattering, and I like the color. It performed well under a hoodie on a low 50-degree day."

"I ordered two thermal shirts, a black and purple one. I love them both! The material is soft with the perfect amount of stretch. The length was perfect too, and I like that the shirts don't roll up. Please add more colors to your collection."

"I bought this to wear under my scrubs. It's very lightweight and kept me warm while working in the hospital. The garment doesn't ride up or move under my scrubs at all. I'll definitely be ordering more; it's worth the money!"

"This shirt is incredibly soft and warm. The quality is really good, and I’m very pleased with this purchase! It was even better than I expected, and I plan to use it as a base layer for my long winter walks!"