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Rocky Thermal Underwear for Kids offers a premium base layer solution combining ultra-soft fleece lining with moisture-wicking technology and durable poly-spandex construction. Designed to stay put under heavy winter gear, these thermals provide all-day warmth and comfort, making them the #1 choice in boys' thermal underwear sets.

























































| ASIN | B0859L35SR |
| Best Sellers Rank | #870 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #1 in Boys' Thermal Underwear Sets |
| Customer Reviews | 4.5 4.5 out of 5 stars (5,681) |
| Date First Available | March 5, 2020 |
| Department | boys |
| Manufacturer | Rocky |
C**A
Soft and very comfortable
Loved keep the regular temperature of the body, soft texture, nice color and size fits well for my son .
A**L
True to size and nice and warm. Fabric is soft and stretchy.
Fit is accurate to sizing and the product matches the description. Nice and warm too! My son love it!
S**N
So soft and stylish!
These are soft, warm, and stylish. My son loves how incredibly warm and cozy they are!
J**.
Nice and sore … light weight
Great fit 👍🏾my grand. Perfect
S**T
Great thermals!
I got these for my son who’s 4- he wears them under his rain and snow gear at nature school all day and it seems to keep him much warmer and more comfortable than regular shirts and sweats. I didn’t notice any shrinkage but I have found that they pill quite a bit especially when used as under clothes. The patterns were exactly as they were advertised and the size guide seemed to be great gage of what to purchase!
K**R
Great thermal base layer.
Very nice quality. Fits true to size. Perfect as a base layer.
N**A
Perfect for mammoth
Super soft and true to size. My 11 year old son got well in the large
B**N
Decent
Decent base layer. The top is too short for my son but he is tall. Bottoms fit fine.
R**.
My son loves these, they are light and breathable, yet warm. The material is exceptional, and so far has not shrank. My child uses these for skating and hockey. We used to layer up with pajama pants, but this is much better. Coincidentally, these can also be used as pajamas. * They are comfortable. * They are breathable. * They do not shrink.
K**E
Ligero y muy suave
B**E
As expected
D**M
Fits great!!
K**O
Does not feel warm, lining gives clammy feel.
Trustpilot
3 weeks ago
3 weeks ago