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Great to wear indoors as pajamas, as well as outdoors as a thermal layer.
Boys' Thermal Underwear Sets
Find your perfect fit
These kids thermal long johns and long sleeve shirts have the perfect blend of comfort, warmth, elasticity and breathability.
The children's winter base layer fits snugly enough to be comfortable under clothes, even under jeans, without getting in the way of sports and play.
Experience unmatched comfort
THERMAL UNDERWEAR FOR KIDS
Wrap yourself in pure comfort and warmth with the ATTIQOZI boys' thermal set making lounging cozier than ever before. Its seamless design is all about unrivalled style and comfort.
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Moisture Wicking
The elastic fabric allows the child to move freely
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Fleece Lined
Excellent warming effect so children can enjoy playing in winter
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Jessica Berg
2025-08-02 11:57:52
These fit my 12 year old son well and they kept him toasty on a recent winter camp out. We liked the hunter green color too.
Monica
2025-07-05 11:20:31
These fit great for my 8 and 10 year old. Exactly as advertised!
cdoshi
2025-05-03 21:33:18
These are a good set of thermal innerwear for boys.They fit well and snug and feel soft and warm.They work well, especially in this cold season. Well worth it.
Derek Boyles
2025-04-30 17:24:01
My son started wearing thermal underwear under all his athletic clothing so this is exactly what he was looking for. The stretch is pretty decent and the quality seems decent too. So far, we've washed it about 6 or 7 times and it still looks like the day we bought it. I have a strong feeling I will be ordering more!
Mama Callie
2025-04-17 15:51:08
I purchased this set of thermal underwear for my 6 year old who needed some layering under his jeans to keep warm during the cold months. Its getting particularly nippy in the morning, and its only going to get colder as we move further into winter. This product came in a few color options to choose from, and I chose the option that included a grey set and black set. They feel buttery soft, which was a bit surprising and different than the waffle knit long johns im acquainted with. I like the smooth texture, it reminds me of the leggings i generally prefer, and I bet they will be just as comfy for my little man. So far they have washed well in a regular cycle, seem true to size and are a good value for 2 pair in the package. Shipping was decent, and we received our order within a few days. A solid choice for thermal underwear as they are thin enough to fit great as a layer, not tight and compressive but rather smoothing and soft, and provide extra protection against the cold and wind. Im looking to see if this brand has a toddler size for my younger son.
KEVIN SUTHERLIN
2025-04-09 13:33:18
I love these and they work so great! I work on an office and in a warehouse. Not too hot inside and keeps me warm outside in the cold! Worth the money!
BookLoving Family
2025-02-05 13:08:02
I’m very pleased with this two pack of long johns for my son!What I liked best:— they have a nice trim fit but are not hard to get on. Lots of stretch so they’re not constricting.— the style is very cute! I love the colors and the contrasting stitching. They do have a vintage long John vibe.Be aware …— they have a slight off odor when opening the package. It’s not quite “chemical†and isn’t unpleasant. I couldn’t really place it. It dissipated quickly and is gone now that the sets are washed. I’d recommend washing before wearing since I just don’t know what that smell was.— they look like underwear. This is clear from the pictures, of course, but if you’re hoping these could double as pajamas or be used for lounging around, you’ll be disappointed. The stitching says “UNDIES†so you won’t be taking your child on a quick errand without adding pants.I’m very pleased with the quality and value of these long johns!
Kimberly
2025-02-02 11:05:36
These are quite thin. Therefore making it not the most warm, although he said they are comfortable.
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