Warm
My son is 4 and has been using this under his soccer shorts and jersey. Soft material for comfort, fits nice and snug as needed. The temperature has been low 40s and high 30s and he’s still warm in this. Read more

American Trends
In Stock
Easy Returns · Return eligibility shown before checkout
| department | boys |
|---|---|
| date_first_available | February 21, 2023 |
| product_warranty | For warranty information about this product, please click here |
| best_sellers_rank | #34,674 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #5 in Boys' Thermal Underwear Sets |












Product video 1
Customers say
Customers find the thermal underwear set keeps kids warm in temperatures ranging from low 40s to high 30s, and appreciate its soft material, good fit, and quality.
My son is 4 and has been using this under his soccer shorts and jersey. Soft material for comfort, fits nice and snug as needed. The temperature has been low 40s and high 30s and he’s still warm in this. Read more
I bought these for a snowboarding trip to Colorado for my toddlers and they LOVED them. They ended up wearing these pretty much the entire trip and even when we got home. The quality was excellent. It was super thick, fit great and the boys love how comfortable they were. I will be buying these again next winter! Read more
Very warm thermals for my toddler! Soft material. They have washed well so far and are holding up after multiple wears. The fit is appropriate for my toddlers size. I would buy again! Read more
I bought the yellow for a duck costume and it is very bright and soft. Perfect. I was worried it would be pale but it was surprisingly perfect! Read more
The quality of these thermals is great - soft, warm, and comfortable for my 3 year old. However, the sizing runs a bit small. I ordered size X-Large (4T-5T) thinking it would be slightly loose(since he usually wears 4T), but it fits snuggly right now, so he'll likely outgrow it soon. I wish the sizing was a bit more generous. Still, overall a good buy for the quality, just keep in mind the size runs small. Read more
You know how it is, you’re nervous to order something online from some random company that could suck. This set doesn’t! These are comfy and warm for my 2.5 year old. Snug enough that they’ll fit nicely under a pair of sweat pants and sweatshirt when we need to layer to go outdoors, but not annoyingly tight. Happy! Read more

The media could not be loaded. It came folded up so small and in a cute little pack! I didn't realize the material was fleecey on the outside as well, but it definitely made it more snuggly! It's super stretchy width-wise, but does not stretch length-wise (see video). It is a little thinner than a sweatshirt, but seems more breathable. Size tends to be closer to the smaller size (i.e., 3T-4T is closer to 3T), so I would suggest sizing up if you're on the fence. Read more

My son LOVES these. We purchased to wear under his outfit for our outdoor wedding, but he prefers them as pjs! Read more
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