Smartwool  Classic Thermal Merino Base Layer Bottoms - Kids'

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When the mercury dips and your kiddos head out to play, layer them up with Smartwool Classic Thermal Merino kids' base layer bottoms in cool conditions, or they can wear them alone on a mild day.

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Features

  • Supersoft Mid 250 merino wool fabric made with an interlock knit for enhanced comfort, breathability, thermoregulation and odor resistance
  • Merino-covered elastic waistband adds comfort
  • Flatlock seam construction designed to minimize chafing
  • Machine wash warm on gentle cycle; do not bleach; tumble dry low; cool iron as needed

Imported.

View the Smartwool Classic Thermal Merino Product LineView all Smartwool Kids' Base Layer Bottoms

Technical Specs

Best Use

Multisport

Fabric

Merino wool

Moisture Wicking

Yes

Quick Drying

Yes

Underwear Weight

Midweight

Inseam (in.)

20 inches

Gender

Kids'

Sustainability

Contains ZQ merino wool

Size Chart

Smartwool Clothing - Unisex Kids'
XSSMLXL
Age Range4 - 56 - 89 - 1011 - 1213 - 14
Height Range42 - 4848 - 5454 - 5757 - 6060 - 62
Weight Range42 - 49 lbs.49 - 59 lbs.59 -75 lbs.75 - 89 lbs.89 - 100 lbs.
Chest24 - 2525.5 - 2627 - 2828.5 - 3030.5 - 32
Waist22 - 22.523 - 2424.5 - 2525.5 - 2626.5 - 28

Sizing Notes

Measurements are stated in inches unless otherwise indicated.

Reviews
71 reviews with an average rating of 4.7 out of 5 stars

Ratings Snapshot

Product Rating

10 out of 12 (83%) reviewers recommend this product

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Average Customer Ratings

Overall Fit Rating

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Customer Images

margies
NM
Rated 5.0 out of 5 stars

Great Product!

15 years ago

I bought this for my 11-year-old son to use as pajamas on an upcoming back packing trip he is doing with Boy Scouts. My son is a VERY skinny kid and always cold, so I hoped these would be warm. This past weekend, he got a chance to "test" these bottoms when he was invited to go along on a camping trip with a friend. When he came home he said he loved it! He said it kept him warm and cozy in his sleeping bag, even though he is skinny. This is a HIGH endorsement from him. He has used this sleeping bag on many camping trips and is often cold 9even though it's a 0*F bag.This past weekend he was at a higher altitude, on a particularly cold/rainy weekend. I know he'll be able to wear them under clothes - and ski gear - to stay warm. I highly recommend this long underwear. It will keep you child "warm and cozy" in the cold.

Yes , I recommend this product
Helpful?
ColdinNYC
Rated 4.0 out of 5 stars

Runs very small

10 years ago

I'm a petite adult who can usually wear kids' clothes in size L or XL. These leggings in size XL are very small. The inseam is about 22.5" and the waist, unstretched, is about 11.5" across. I ordered two pairs, and one pair was defective, with one leg 1.5" longer than the other! Those will be returned...

Yes , I recommend this product
Helpful?
Jacob
Kentucky
Rated 1.0 out of 5 stars

I have never seen something that attracts so much hair

1 year ago

I bought these without comparing them to anything else because I trust the smart wool brand. They were expensive but I viewed it as an investment. They attract more hair than I knew we ever had in our home. We pull them out of the wash/ drier and you almost can't see the fabric- where did all this hair come from?! I spent a TON of time with a lint roller and my hands removing hair and almost got them back to new and every time my kids wear them it's right back. My wife's hair? The neighbors cat? A deer in the woods? It seems like if the kids get within 100 yards of anything with hair that hair ends up on these pants. It's gross, I don't understand it... but it's just awful.

No, I do not recommend this product
Originally posted on smartwool.com
Response from smartwool.com
smartwoolpwr
1 year ago

Hi there, thank you for sharing your experience with us. Each season, we work to improve product offering, comfort, fit and durability on all products. We're sorry to hear this product didn't work out for you. Thankfully, all of our products are backed by our Go Far. Feel Good.â„¢ Guarantee. You can find all the details about our Guarantee here: https://www.smartwool.com/discover/smartwool-guarantee.html

shonagh
Redmond
Rated 5.0 out of 5 stars

Effective against damp cold

17 years ago

These Smartwool pants are so cozy and warm. I wear them under my cargo pants with my Ugg boots and this California girl is perfectly comfortable in this damp, cold, Seattle weather.

Yes , I recommend this product
Helpful?
Isabel
Undisclosed
Rated 2.0 out of 5 stars

Disappointed purchase

2 years ago

[This review was collected as part of a promotion.] So disappointed. These leggings arrived with snags on them already. We were pressed for time in sending my son to his Boy Scout Klondike Hike, so he had to wear them. Now I cringe when I look at them.

Originally posted on smartwool.com
Response from smartwool.com
smartwoolpwr
2 years ago

Thank you for the feedback you gave through our website. It's important to hear how we're doing, and we take it very seriously. We want to provide the best products paired with the best service so you can keep going far and feeling good. We're sorry to hear you're experiencing some durability issues with our products and want to assure you this is out of the norm for Smartwool, as we make our products to last! Thankfully, all of our products are backed by our Go Far. Feel Good.â„¢ Guarantee. You can find all the information about our Guarantee here: https://www.smartwool.com/discover/smartwool-guarantee.html

peaches
Seattle
Rated 3.0 out of 5 stars

Warm but not durable

1 year ago

Started developing holes a few months in (daily use during late fall/winter, rotating between a few of these). I patched some of the bigger holes, but I keep getting tiny ones. Sadly, the quality difference between the kids’ and the women’s versions is very noticeable.

No, I do not recommend this product

Overall Fit Rating

Runs SmallRuns Large
Helpful?
snowshoeextreme
Batavia, IL
Rated 5.0 out of 5 stars

Fabulously fuzzy and comfortable

16 years ago

These pants are comfortable and fit great- I wore them in 30 weather as a pajama pant and inside my sleeping bag I was quite warm. They move well without binding and wash easily.

Yes , I recommend this product
Helpful?
Shelby
Undisclosed
Rated 5.0 out of 5 stars

Awesome In Every Way & So Worth It

4 years ago

Bought boys and girls 250 base layer bottoms and tops for my kids ages 4 and 5 1/2. They LOVE it. So warm I can't get them inside (parent win for some quiet time), so cozy they sleep in them (parent win for fewer clothes changes). They've kicked butt in Vermont skiing at Mad River and Nor'easters just north of Boston. Only bad thing is they won't grow with my kids, so I'll be back again next year to size up! But for this year, absolutely fits true to the size chart.

Originally posted on smartwool.com
Shelby
Undisclosed
Rated 5.0 out of 5 stars

Awesome In Every Way & So Worth It

4 years ago

Bought boys and girls 250 base layer bottoms and tops for my kids ages 4 and 5 1/2. They LOVE it. So warm I can't get them inside (parent win for some quiet time), so cozy they sleep in them (parent win for fewer clothes changes). They've kicked butt in Vermont skiing at Mad River and Nor'easters just north of Boston. Only bad thing is they won't grow with my kids, so I'll be back again next year to size up! But for this year, absolutely fits true to the size chart.

Originally posted on smartwool.com
Carmen
Undisclosed
Rated 5.0 out of 5 stars

Perfect

1 year ago

[This review was collected as part of a promotion.] This will be great for my preschooler this fall. The quality seems great-thick enough, light enough, warm enough. I will say to follow the size chart because based on other reviews I thought it would run small but after measuring my 4 year old I chose the equivalent to 3t and my daughter still has a couple inches to grow into. #sweepstakes

Originally posted on smartwool.com
1 - 10 of 71 Reviews

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