American Trends

American Trends Kids Thermal Underwear Set Ultra Soft Kids Long Johns Sets Toddler Base Layer for Boys Girls

$16.99$21.99
size6

192+ bought in the past month

$16.99
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Technical specifications
departmentboys
date_first_availableFebruary 21, 2023
product_warrantyFor 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

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Customer reviews

4.71,154 ratings
  1. 588%
  2. 413%
  3. 30%
  4. 20%
  5. 10%

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.

★★★★★

Warm

Emmanuel DampliasJanuary 31, 2026✓ Verified purchase

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

★★★★★

Super cute and comfortable.

MeaghanAugust 11, 2025✓ Verified purchase

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

★★★★★

WOULD BUY AGAIN!

Chelsea BDecember 24, 2025✓ Verified purchase

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

★★★★★

Amazing!!

Matt DooleyOctober 5, 2025✓ Verified purchase

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

★★★★☆

Good quality but runs a bit small

PrazOctober 31, 2025✓ Verified purchase

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

★★★★★

Worth it

KristinaDecember 9, 2025✓ Verified purchase

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

Review image 1
★★★★★

Soft and warm

Jessica CastroDecember 3, 2023✓ Verified purchase

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

Review image 1
★★★★★

So soft

Lexi Harding GorskeDecember 30, 2025✓ Verified purchase

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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