---
product_id: 171973817
title: "Thermajohn Thermal Underwear for Kids, Boys Thermal Underwear Set, Base Layers for Skiing, Long Johns for Boys Kids"
price: "A$70"
currency: AUD
in_stock: true
reviews_count: 8
url: https://www.desertcart.com.au/products/171973817-thermajohn-thermal-underwear-for-kids-boys-thermal-underwear-set-base
store_origin: AU
region: Australia
---

# Advanced moisture wicking Superior heat retention Ultra-soft fleece lining Thermajohn Thermal Underwear for Kids, Boys Thermal Underwear Set, Base Layers for Skiing, Long Johns for Boys Kids

**Price:** A$70
**Availability:** ✅ In Stock

## Summary

> ❄️ Gear Up, Stay Warm, and Never Miss a Snow Day!

## Quick Answers

- **What is this?** Thermajohn Thermal Underwear for Kids, Boys Thermal Underwear Set, Base Layers for Skiing, Long Johns for Boys Kids
- **How much does it cost?** A$70 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/171973817-thermajohn-thermal-underwear-for-kids-boys-thermal-underwear-set-base)

## Best For

- Customers looking for quality international products

## Why This Product

- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Freedom to Move:** 4-way stretch design ensures unrestricted mobility for every sled ride, hike, or snowball fight.
- • **Seamless Layering:** Slim fit base layer slips effortlessly under any outfit for discreet, all-day warmth.
- • **Cloud-Like Comfort:** Fleece lining so soft, your kids won’t want to take it off—perfect for play or downtime.
- • **Dry & Fresh Always:** Moisture-wicking fabric keeps sweat and odors at bay, even during the most active snow days.
- • **Stay Toasty All Day:** Locks in warmth with premium heat retention tech for endless winter adventures.

## Overview

Thermajohn Thermal Underwear for Kids is a high-performance base layer designed to keep boys warm, dry, and comfortable in cold weather. Featuring ultra-soft fleece lining, moisture-wicking polyester-spandex fabric, and 4-way stretch for mobility, this thermal set is perfect for skiing, snow play, or cozy indoor wear. Its slim fit and elastic waistband ensure a secure, comfortable fit that layers easily under winter clothes.

## Description

When it comes to daily wear, Thermajohn offers thermal underwear for kids for a snug fit. Our boys thermal underwear make the perfect base layer kids for when your kids are outside in the snow or lounging indoors. Our boys long johns thermal set features an elastic waistband so they stay in place with no drooping or chances of them falling off. Kids long johns thermal set boys are lightweight and breathable and can be worn under their regular clothes as part of a winter layering system. Long johns for boys will retain their body heat so they stay warmer longer. To keep your kids dry and odor free, our boys long johns with wick away moisture to reduce the chances of hypothermia and frostbite. ThemaJohn Kids Boys Thermal Set is so comfortable, your kids will want to wear them to school, bed, sled riding even indoors playing video games. Our kids thermals top and bottom set are essential for your kids cold weather comfort with fleece for added warmth. These boys thermal pants, boys fleece lined thermal sets are made to feel ultra-soft against their skin so there’s no need to worry about discomfort like chafing or itchiness. Any boys thermal shirt or clothing for extreme cold weather is perfect for traveling and easy to take care of. Best extreme cold weather thermals or long underwear kids make perfect kids winter clothes. You can buy these as a kids thermals top and bottom set to keep your younger children warm. Boys thermal pants and cold weather gear is essential for when the winter is at its worst and kids snow gear is good for all occasions. Kids base layer ski or boys thermals is vital for the slopes and hiking and toddler thermal underwear set keep the warm with the family. Kids winter baselayer and kids long johns is the right type of youth thermal underwear set for playing in the snow or building a snow fort. Winter thermal clothes for kids and a toddler long johns, toddler long underwear or boys fleece lined thermal set will keep the small kids warm.

Review: Comfy, great quality - I used these for my son who wanted to be a minion for Halloween. They were perfect! Bonus points for being extra warm. Then we used them as long John’s for when it snowed out. Would definitely purchase again. My son even slept in them as PJ’s so we definitely got our money worth from them.
Review: No just for children - I purchased these in XL dark navy blue. I'm 107lbs female 5'5 And these fit great! The sleeve on the top feels a bit short but they do come to a comfortable place so that might just be a personal preference. They are extra soft. The opening in the bottoms is sewn closed which is perfect. I'm wearing them to bed as I type this and couldn't love them more. Color is great. Fit is perfect and I'm nice and warm. Win win win.

## Features

- Heat Retention: Our boys thermal underwear set will keep your child warm. Wear the boys long johns thermal set as a baselayer under clothes or wear alone around the house.
- Ultra Soft: Thermajohn kids, long johns for boys have a fleece lining that will keep your boys comfortable when they’re out in the cold or relaxing at home.
- Moisture Wicking: Stay dry and odor free with our kids thermal set. They wick away moisture and are ideal for snow clothes for kids.
- 4 Way Stretch: Mobility and Flexiblitly are essential for movement and activity in our kids long underwear. This boys fleece lined thermal set will fit snugly, but stretch so there’s nothing holding them back.
- Layer Up: Long johns for kids are perfect as a base layer. They are slim enough to fit under your boy’s regular clothes easily for added protection from the cold.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Care instructions | Machine Wash |
| Fabric type | 92% Polyester, 8% Spandex |
| Origin | Imported |

## Images

![Thermajohn Thermal Underwear for Kids, Boys Thermal Underwear Set, Base Layers for Skiing, Long Johns for Boys Kids - Image 1](https://m.media-amazon.com/images/I/71KAksdz+DL.jpg)

## Available Options

This product comes in different **Color, Size, Style** options.

## Questions & Answers

**Q: My son normally wears an 8 but I did the measurements on the chart and they don’t make sense. What would a small 11yr old wear!**
A: I got xl for my son who’s 11 but he’s tall

**Q: Sizing? i have never bought this brand. where’s your sizing chart??**
A: I ordered an extra large for my 12-year-old son given the sizing photo provided that says extra large is equivalent to an 11 to 12. The measurements on the package that arrived, however, are much larger, and they were huge. I will be re-ordering two sizes smaller.

**Q: If my son normally wears a 3t what size would i order?**
A: Hi! Our sizing starts at XS which is suitable for ages 5-6.

**Q: Can they go in washer? Dryer?**
A: Hi! Yes, you can put them in the washer and dryer to launder. Please wash with like-colors only!

## Customer Reviews

### ⭐⭐⭐⭐⭐ Comfy, great quality
*by A***R on December 28, 2025*

I used these for my son who wanted to be a minion for Halloween. They were perfect! Bonus points for being extra warm. Then we used them as long John’s for when it snowed out. Would definitely purchase again. My son even slept in them as PJ’s so we definitely got our money worth from them.

### ⭐⭐⭐⭐⭐ No just for children
*by D***F on February 3, 2023*

I purchased these in XL dark navy blue. I'm 107lbs female 5'5 And these fit great! The sleeve on the top feels a bit short but they do come to a comfortable place so that might just be a personal preference. They are extra soft. The opening in the bottoms is sewn closed which is perfect. I'm wearing them to bed as I type this and couldn't love them more. Color is great. Fit is perfect and I'm nice and warm. Win win win.

### ⭐⭐⭐⭐⭐ Great base layer (or PJ)
*by F***S on December 30, 2024*

Soft, stretchy, comfortable. Great base layer under jeans, rain pants, T shirts, etc! Often my kids will wear these as Pajamas and then just get dressed in the morning by pulling their clothes ontop. Keeps them warm. Great quality and price

## Frequently Bought Together

- Thermajohn Thermal Underwear for Kids, Boys Thermal Underwear Set | Kids Base Layers for Skiing | Long Johns for Boys Kids
- Anlisim Kids Merino Wool Ski Socks 3 Pairs Girls Boys Thermal Winter Warm Thick Breathable Socks for Skiing Snowboarding
- Thermajane Thermal Underwear for Kids Long Johns, Girls Thermal Underwear Set, Base Layer Kids Long Underwear

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.com.au/products/171973817-thermajohn-thermal-underwear-for-kids-boys-thermal-underwear-set-base](https://www.desertcart.com.au/products/171973817-thermajohn-thermal-underwear-for-kids-boys-thermal-underwear-set-base)

---

*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-02-23*