Arctic Hero Boys Thermal Underwear Waffle Knit Top and Long Johns Underwear Set 4 Piece (2-18), 3T Grey/Royal
Arctic Hero Boys Thermal Underwear Waffle Knit Top and Long Johns Underwear Set 4 Piece (2-18), 3T Grey/Royal
Hero image 0 of Arctic Hero Boys Thermal Underwear Waffle Knit Top and Long Johns Underwear Set 4 Piece (2-18), 3T Grey/Royal, 0 of 7
Arctic Hero

Arctic Hero Boys Thermal Underwear Waffle Knit Top and Long Johns Underwear Set 4 Piece (2-18), 3T Grey/Royal

423 ratings
Arctic Hero Boys Thermal Underwear Waffle Knit Top and Long Johns Underwear Set 4 Piece (2-18), 3T Grey/RoyalArctic Hero Boys Thermal Underwear 4 Piece Waffle Knit Top and Long John Set Size 2 18Arctic Hero Boys Thermal Underwear 4 Piece Waffle Knit Top and Long John Set Size 2 18Arctic Hero Boys Thermal Underwear 4 Piece Waffle Knit Top and Long John Set Size 2 18Arctic Hero Boys Thermal Underwear 4 Piece Waffle Knit Top and Long John Set Size 2 18Arctic Hero Boys Thermal Underwear 4 Piece Waffle Knit Top and Long John Set Size 2 18Arctic Hero Boys Thermal Underwear 4 Piece Waffle Knit Top and Long John Set Size 2 18Arctic Hero Boys Thermal Underwear 4 Piece Waffle Knit Top and Long John Set Size 2 18Arctic Hero Boys Thermal Underwear 4 Piece Waffle Knit Top and Long John Set Size 2 18Arctic Hero Boys Thermal Underwear 4 Piece Waffle Knit Top and Long John Set Size 2 18Arctic Hero Boys Thermal Underwear 4 Piece Waffle Knit Top and Long John Set Size 2 18Arctic Hero Boys Thermal Underwear 4 Piece Waffle Knit Top and Long John Set Size 2 18Arctic Hero Boys Thermal Underwear 4 Piece Waffle Knit Top and Long John Set Size 2 18Arctic Hero Boys Thermal Underwear 4 Piece Waffle Knit Top and Long John Set Size 2 18Arctic Hero Boys Thermal Underwear 4 Piece Waffle Knit Top and Long John Set Size 2 18Arctic Hero Boys Thermal Underwear 4 Piece Waffle Knit Top and Long John Set Size 2 18Arctic Hero Boys Thermal Underwear 4 Piece Waffle Knit Top and Long John Set Size 2 18Arctic Hero Boys Thermal Underwear 4 Piece Waffle Knit Top and Long John Set Size 2 18Arctic Hero Boys Thermal Underwear 4 Piece Waffle Knit Top and Long John Set Size 2 18Arctic Hero Boys Thermal Underwear 4 Piece Waffle Knit Top and Long John Set Size 2 18Arctic Hero Boys Thermal Underwear 4 Piece Waffle Knit Top and Long John Set Size 2 18Arctic Hero Boys Thermal Underwear 4 Piece Waffle Knit Top and Long John Set Size 2 18Arctic Hero Boys Thermal Underwear 4 Piece Waffle Knit Top and Long John Set Size 2 18Arctic Hero Boys Thermal Underwear 4 Piece Waffle Knit Top and Long John Set Size 2 18Arctic Hero Boys Thermal Underwear 4 Piece Waffle Knit Top and Long John Set Size 2 18
ColorGrey/Royal
Clothing Size3T

Key item features

  • Warm Base Layer: This boys' thermal underwear set provides all-day warmth, featuring a soft waffle knit top and long johns designed as a reliable, breathable, and lightweight base layer.
  • Comfortable Stretch: The thermal set includes a classic crewneck long sleeve shirt and matching waffle pants, offering skin-friendly comfort with just the right amount of stretch for active days.
  • Versatile Layering: The thermal clothes set can be mixed and matched, worn on its own, or layered under jackets and sweaters, with a clean crewneck design for easy integration into any wardrobe.
  • Durable Fabric Care: Made to handle repeated washes, the waffle knit fabric resists pilling and shrinking, ensuring the thermal long sleeve shirt maintains its shape and softness wear after wear.
  • Everyday Comfort: Designed for active kids, this two-piece set offers a comfortable fit that moves naturally, providing dependable comfort and effortless style for school, home, or outdoor play.
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About this item

Product details

Meet the Arctic Hero boys' thermal set designed for comfort that keeps up with every part of his day. Made with a soft waffle-knit texture, this two-piece set includes a long sleeve crewneck top and matching pants that feel easy, lightweight, and cozy from morning to night. Whether he's heading to school, relaxing at home, or getting ready for outdoor play, this set offers a simple, classic look that fits right into his everyday routine. Designed to move naturally with active kids, it delivers a comfortable fit that never feels restrictive. The clean, versatile style makes it easy to wear on its own or pair with his favorite layers when temperatures change. From cool mornings to laid-back evenings, this boys thermal underwear set brings dependable comfort and effortless style-making it a go-to choice for any season and any adventure.
  • Thermal Leggings All-Day Warmth: Keep your boy cozy on chilly days with this boys thermal underwear set designed as a reliable base layer kids love. The thermal long sleeve and thermal pants combo features a soft waffle knit top that stays breathable and lightweight. Whether layered under kids long sleeve shirts for boys or worn on its own.
  • Thermal Shirt Comfort That Stretches: This boys thermal set includes a classic crewneck long sleeve shirt and matching waffle pants for a clean, easy look. The skin-friendly thermal shirts, thermal undershirt, and waffle knit tops offer just the right amount of stretch for active days. From sports practice to schoolyard play, these thermals for kids stay in place and feel soft all day.
  • Long Johns For Kids Mix And Match: Pair this thermal clothes set or boys thermal shirt with jeans for a simple outfit, or wear the thermal long sleeve top under jackets and sweaters. The clean crewneck design makes layering easy, while the waffle knit adds subtle texture. These boys thermal long sleeve shirts and boys long sleeve shirts size 8 to boys long sleeve shirts fit seamlessly into any wardrobe.
  • Waffle Knit Set Easy Care: These boys long sleeve shirts and thermal pants are made to handle repeated washes while keeping their shape and softness. The waffle knit fabric helps resist pilling and shrinking, so each boys thermal long sleeve shirt looks fresh wear after wear. Designed as thermal wear, this thermal underwear for kids and kids thermal underwear set provides reliable warmth you can count on.
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Specifications

Long underwear type

Thermal Sets

Clothing feature

Stretchable

Fabric content

60% Cotton, 40% Polyester

Season

Fall, Winter

Directions

Fabric Care Instructions

Machine Wash

Warranty

Warranty information

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Customer ratings & reviews

4 out of 5 stars
stars
423 ratings119 reviews
Includes global ratings and reviews
How item rating is calculated
  1. 5 stars63% (267)
  2. 4 stars10% (41)
  3. 3 stars7% (28)
  4. 2 stars6% (27)
  5. 1 star14% (60)

Reviews summary

Pros

  • : Provides warmth while allowing airflow.
  • : It offers acceptable quality while remaining inexpensive.
  • : Can be worn under various clothing types.

Neutral

  • : Can be excellent, but also prone to shrinkage and inconsistencies.

Cons

  • : Runs smaller than expected sizes, may not fit as anticipated.
  • : Fits smaller after washing, loses size and shape.
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Showing 1-3 of 119 reviews

Jan 20, 2026
Reviewer name: Genius
Top Reviewer
Item details
Color: Navy/Charcoal
Clothing size: 5-6
Sold byAll Brands NYCDelivered byWalmart
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Perfect for layering

Great for my 4yr old son

Helpful?47NMYCWX0JQB1467887134
Nov 17, 2025
Reviewer name: Sharon
Top Reviewer
Item details
Color: Black/Ecru
Clothing size: 5-6
Sold byAll Brands NYC
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

The material is really thick and keeps warm during chilly weather!

Helpful?47NMYCWX0JQB1467887134
Nov 7, 2025
Reviewer name: Cassandra
Item details
Color: Grey/Royal
Clothing size: 12-14
Sold byAll Brands NYCDelivered byWalmart
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

My grandson loves to wear them.! To sleep in to relação i'm, everything !

Helpful?47NMYCWX0JQB1467887134
Current price is $19.98
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