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❄️ Keep your kiddo warm, dry, and unstoppable this winter!
Rocky Thermal Underwear for Kids combines ultra-soft fleece lining with a durable 90% polyester, 10% spandex blend to deliver a snug, stay-put fit that resists wear and tear. Designed for everyday cold weather and skiing, these long johns wick moisture away while providing lightweight warmth and all-day comfort. Machine washable and built tough, they’re the #1 boys’ thermal underwear set trusted by thousands of parents.
| ASIN | B01M12L67P |
| Age Range Description | Little Kid |
| Apparel Closure Type | Pull On |
| Apparel Fabric Stretch | Medium Stretch |
| Apparel Fabric Weight Class | Medium Weight |
| Best Sellers Rank | #38,012 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #1 in Boys' Thermal Underwear Sets |
| Brand Name | Rocky |
| Care instructions | Machine Wash |
| Collection Name | Rocky |
| Color | Black |
| Customer Reviews | 4.5 out of 5 stars 5,726 Reviews |
| Fabric Type | 90% Polyester, 10% Spandex |
| Fabric type | 90% Polyester, 10% Spandex |
| Fit Type | Regular |
| Fit to Size Sentiment | fits as expected |
| Manufacturer Part Number | LYSB01M12L67P-SPRTSEQIP |
| Material Type | Polyester Blend |
| Neck Style | Crew Neck |
| Number of Items | 1 |
| Occasion Type | Everyday |
| Origin | Made in the USA and Imported |
| Package Quantity | 1 |
| Pattern | Solid |
| Product Care Instructions | Machine Wash |
| Size | Large |
| Sleeve Length Description | Long Sleeve |
| Sleeve Type | Long Sleeve |
| Style Name | Snug |
| Style Number | 85BKL |
| UPC | 789900659432 |
| Unit Count | 1 Count |
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!
V**V
Cozy for winters
So warm and cozy, my son loves it. Great to wear as a base layer in the winter. My son loved it so much I had to buy another. Yes, it does pill. But i think it's because the fabric is thin. Serves our purpose well.
K**R
Great thermal base layer.
Very nice quality. Fits true to size. Perfect as a base layer.
H**I
Not bad
My son loves these. We bought them for a trip that we are going to on Friday but he has insisted on wearing them to bed since we got them. We will be putting them to the true test on Saturday cause we are going to the ice castles and these were meant to keep him warm under his snow pants and jacket. They are super soft and I wish I had a pair cause they really feel so cozy. The crotch area did rip even tho he has wiggle room after the first use but we don’t have time to go through the whole return and blah blah blah. I will let you all know how they do with cold climates for anyone wanted them for that purpose :)
S**A
Breathable, fun design, comfortable
Good fitting, kept my grandson warm while playing in the blizzard of 2026.
R**N
Great Quality
Great items! My son is learning to ice skate and needed some thermals to wear under his cloths while on ice. They provide just the right warmth for our little one. They are also true to size and very good quality. I would highly recommend!
L**E
Super soft and warm
Super soft and warm and the fit is just right
R**.
Perfect for Skating and Sports
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
Muy buena compra
Ligero y muy suave
B**E
Fleece lined
As expected
D**M
Confy
Fits great!!
K**O
Postage doubles the cost of the purchase price.
Does not feel warm, lining gives clammy feel.
Trustpilot
2 months ago
1 month ago