Best Thermal Underwear Sets for Women of 2026

"From the first time I tried these on, I was impressed by how easy they are to put on and how comfortably they fit. The fabric stretches just right, so it’s never too tight or hard to pull up. They feel incredibly soft and warm, and even after multiple washes, the shape and softness stay the same. These long johns are now my go-to for cold weather layering or wearing alone. I genuinely recommend them for anyone needing reliable winter wear."

"I love how cozy and versatile these thermals are—great under clothes or as pajamas. They stay put in bed, don’t ride up, and keep me warm through the night. I bought two sizes for different uses, and both work perfectly. The softness and warmth make them a staple in my winter wardrobe."

"I wore these in -6 degree weather and never felt cold! The material is thick but not bulky, which made layering under fitted jeans easy. The top’s thumb holes are a great touch, and the set felt snug and comfortable all day. No strange odors out of the package and the price was fantastic. I’ll definitely be buying more."

"I got two sets, one for myself and another for my daughter, to use as thermals during our snowboarding trip. The fit was spot on and the material felt soft, almost like pajamas. We stayed comfortable and dry out in the cold, and the price was definitely reasonable. I’d highly recommend these!"

"As a dog walker in Boston, I face some frigid winter days, but these thermals have been a game-changer for warmth and comfort. They're not super thick but insulate well, and I even found myself sweating after a long walk layered up. The quality really surprised me for the cost, so much so that I bought another pair right away."

"I work outside early in the morning when it's freezing, and these thermals have exceeded my expectations for keeping me warm. The material is soft, fits just right, and never feels bulky. I’m seriously impressed with how well they hold in heat without feeling heavy."

"I've been truly impressed with how lightweight yet warm these longjohns are, especially for the price. They're non-binding and super comfortable, which is perfect for my winter hikes in Georgia. The material feels silky without being too thin, and I never feel bulky or stuffed wearing them."

"I put these thermals to the test working outdoors in -1 degree weather, and they delivered. They're comfortable, not bulky, and keep me warm even in the coldest conditions. The material quality is excellent for the cost."

"These are a lifesaver for skiing! The super soft and thin fabric fits perfectly under multiple layers, and I stayed warm all day. Highly recommend if you want something that doesn't add bulk."

"I am impressed by how cozy and warm these are. I usually wear a medium, but after reading reviews, I decided to size up and I’m glad I did—the fit is perfect and they’re super comfortable."

"This thermal set is incredibly warm and comfortable, plus it fits true to size. It’s an excellent base layer for chilly days, especially between 3–10°C. For everyday winter wear, it’s cozy, reliable, and definitely worth it!"

"I gave this set as a gift and my friend said the inside was so soft she wanted to go back to bed. She’s already purchased a few more! It’s lightweight and works great under clothes—fantastic quality for the price."

"After losing some weight, I was freezing in upstate NY winters until I discovered these thermals. They are incredibly soft and keep me warm even in single-digit temperatures. I ordered a size up for a comfortable fit, and now I can actually handle Syracuse's winter chill!"

"I work outside in cold weather, and these thermals are a game changer. They kept me so warm in 21-degree conditions that I actually started to sweat. Super cozy and perfect for staying comfortable all day."

"On my trip to Washington State, these thermals were a lifesaver. Everyone else complained about the cold, but I stayed relaxed and warm thanks to this set. They layer perfectly under my clothes and made my trip so much more enjoyable."

"I've worn Fruit of the Loom for years, and I’m still impressed by the softness and warmth of these thermals. The material feels great and doesn’t add bulk under clothing, making it perfect for layering. I do wish the sizing was a bit more generous—I had to size up more than I expected. Still, I appreciate the quality and the cozy feeling they provide."

"The comfort and warmth these thermals offer is just what I was looking for. The fit is perfect in the pants, but the top is a little snug, so I’ll order a size up next time. All in all, they keep me warm even with a lighter layer over them, and I love the color selection."

"As someone who doesn’t like tight clothes, I went with a larger size and it worked out perfectly. These are super soft and cozy, and I even wear them as pajamas. For the price, the quality and comfort really stand out compared to other base layers I’ve tried."

"I was impressed by how soft and warm this set is. The fleece lining is gentle on my skin and it fits well under jeans, making it great for layering in cold weather. I wear it for outdoor walks and work, and it keeps me cozy without feeling bulky."

"I'm 5'6 and 120 lbs, and found the medium a little loose but still snug enough to wear under my jeans and work scrubs. The fabric feels soft and comfortable. So far, I'm pleased with the purchase and looking forward to seeing how it holds up over time."

"I bought this for my first trip to a cold climate and was surprised that the shirt alone kept me warm without a sweater. It was comfortable, lightweight for travel, and looked sleek. Even though there's no fleece, it really did its job."

"I've made these my winter essential—I've bought several pairs already. They're incredibly warm, soft, and the quality is impressive. However, I do recommend sizing up because the waistband runs a bit tight. Despite the sizing, I highly recommend them for cold weather."

"I was unsure about this set at first, but when it arrived, I was pleasantly surprised by how warm, comfortable, and well-made it is. The price is great and the fabric feels luxurious. I’ll definitely order another set."

"Silk as a base layer is unbeatable for me. It’s so lightweight, I barely feel it, yet it keeps me so warm when layered. The color is vibrant and the quality is clear. Just remember to wash in cold water and avoid the dryer!"

"I absolutely love these for wearing under my scrubs—they’re incredibly soft, warm, and true to size. I’ve washed them multiple times, and they’ve held up perfectly, staying soft and cozy inside. The quality has really impressed me."

"This thermal set is just spectacular. The fabric is top quality and blocks cold really well, making it warm and cozy for winter layering. It fits great, stretches comfortably, and I honestly think it’s a must-have for colder months."

"I bought these to wear under tighter clothes and was impressed by the thin, stretchy material. They’re comfortable and keep me warm, even though the fabric is lightweight. Great for layering without feeling bulky."

"The fabric is so soft and gentle on my skin—it keeps me incredibly warm without any bulk. Perfect for layering under everything from jeans to uniforms, and it’s also comfortable enough to wear all day or sleep in. I love that it isn’t restrictive and moves with me. I’d call this a must-have for winter."

"This set exceeded my expectations in both comfort and warmth. The fleece lining really works, but I actually had to turn it inside out once because it was almost too warm for me! Sizing is spot on—I wear XL and the fit was perfect. Definitely recommend if you want to stay cozy."

"My favorite winter layers this year! They’re stretchy but not tight, and the softness is amazing. I’ve bought more because they fit so well under my clothes and launder beautifully with no signs of pilling so far. Highly recommended."