---
product_id: 167216898
title: "Kids Thermal Underwear Boys Ultra Soft Fleece Lined Long Johns Winter Warm"
brand: "herobiker"
price: "¥7096"
currency: JPY
in_stock: true
reviews_count: 13
category: "Herobiker"
url: https://www.desertcart.jp/products/167216898-kids-thermal-underwear-boys-ultra-soft-fleece-lined-long-johns
store_origin: JP
region: Japan
---

# Moisture-wicking breathability Ultra-soft fleece warmth 4-way stretch flexibility Kids Thermal Underwear Boys Ultra Soft Fleece Lined Long Johns Winter Warm

**Brand:** herobiker
**Price:** ¥7096
**Availability:** ✅ In Stock

## Summary

> ❄️ Keep your little champion warm, dry, and unstoppable this winter!

## Quick Answers

- **What is this?** Kids Thermal Underwear Boys Ultra Soft Fleece Lined Long Johns Winter Warm by herobiker
- **How much does it cost?** ¥7096 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/167216898-kids-thermal-underwear-boys-ultra-soft-fleece-lined-long-johns)

## Best For

- herobiker enthusiasts

## Why This Product

- Trusted herobiker brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Cozy All-Day Warmth:** Premium fleece lining locks in heat without bulk, perfect for chilly winter days.
- • **Stay Dry, Stay Fresh:** Advanced moisture-wicking fabric keeps sweat away, ensuring comfort during active play.
- • **Move Freely, Play Hard:** Four-way stretch design adapts to every jump, run, and slide with zero chafing.
- • **Sleek Layering Essential:** Slim fit thermal set fits discreetly under any outfit or sports gear for versatile wear.
- • **Adventure-Ready Base Layer:** Ideal for skiing, cycling, snowboarding, or indoor fun—your kid’s winter must-have.

## Overview

HEROBIKER Kids Thermal Underwear offers a premium fleece-lined, moisture-wicking, and flexible base layer designed for boys. This lightweight, slim-fit long johns set provides superior warmth and comfort for cold-weather activities, featuring four-way stretch fabric and flatlock seams to prevent chafing. Perfect for layering under winter sports gear or everyday wear, it ensures your child stays dry, warm, and agile all season long.

## Description

Buy HEROBIKER Thermal Underwear Boys Ultra Soft Fleece Lined Kids Thermals Long Johns Top Bottom Warm Set for Winter Skiing Black and other Bottoms at desertcart.com. Our wide selection is elegible for free shipping and free returns.

Review: My little one didn't want to take them off! - I would give 10 stars if I could! I will be ordering more for my little guy. It was a struggle to get him to even let me wash them. He has issues with textures but these were perfect for him in every way. I ordered them for a trip to the mountains, thankfully they arrived 5 mins before we left (my fault for last min ordering). They are not thick and have a thin lining of fleece but they are smooth, soft and kept him very warm and comfortable on our hikes in the cold mountains. He wore them the entire trip barely letting me wash them. They wash well, no shrinking nor fading of the vibrant blue. This is definitely worth every penny. Thank you from me and my little one!
Review: A must have - My son hasn't taking these off since the snow hit! He loves the comfort and warmth.

## Features

- ULTRA SOFT & WARM FABRIC: Kids Thermal Underwear is made of premium silky soft lining for excellent comfort and warmth in cold weather
- MOISTURE WICKING & BREATHABILITY: Breathable and moisture wicking fabric is perfect to keep sweat away and dry fast
- EXCELLENT FLEXIBILITY FOR ANY MOVEMENT: Four way stretch compression is designed for Freedom of Movement and to keep your Body Looking Slimmer. Flatlock stitching creates a flat seam to the garment to ensure maximum comfort and prevents chafing
- TOP & BOTTOM: Boys winter thermal underwear is super warm and soft on the inside and thins enough to fit under your any clothes comfortably. This thermal set definitely can be wore as an outdoor compression sports shirt
- FOR ANY OCCASION: This long johns set for cold weather. Idea for all kinds of indoor/outdoor activities, such as cycling, skiing, running, snowboarding, etc

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07ZWHX12M |
| Age Range Description | Little Kid |
| Apparel Closure Type | Pull On |
| Apparel Fabric Stretch | Medium Stretch |
| Apparel Fabric Weight Class | Lightweight |
| Best Sellers Rank | #270,601 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #59 in Boys' Thermal Underwear Sets |
| Brand Name | HEROBIKER |
| Care instructions | Machine Wash |
| Collection Name | thermal underwear |
| Color | Black |
| Customer Reviews | 4.5 out of 5 stars 634 Reviews |
| Fabric Type | 92% ultra-soft polyester 8% spandex |
| Fabric type | 92% ultra-soft polyester 8% spandex |
| Fit Type | Regular |
| Fit to Size Sentiment | Fits True To Size |
| Garment Size Country | American Samoa |
| Import Designation | Imported |
| Item Type Name | Base Layer |
| Manufacturer | China |
| Manufacturer Part Number | HEROBIKER |
| Material Type | Polyester |
| Neck Style | Round Neck |
| Number of Items | 2 |
| Occasion Type | Formal |
| Origin | Imported |
| Package Quantity | 1 |
| Pattern | Solid |
| Product Care Instructions | Machine Wash |
| Size | Small |
| Sleeve Length Description | Long Sleeve |
| Sleeve Type | Long Sleeve |
| Style Name | Classic |
| Style Number | MX1003 |
| UPC | 792966158153 |

## Images

![Kids Thermal Underwear Boys Ultra Soft Fleece Lined Long Johns Winter Warm - Image 1](https://m.media-amazon.com/images/I/61ksce5mUkL.jpg)

## Available Options

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

## Questions & Answers

**Q: I saw a review that stated these are not fleece lined but product description shows it.. can anyone confirm the fleece lining in this product?**
A: The ones I recieved have a very thin fleece lining it's not what you imagine when you hear fleece. But I have several different brands that are fleece lined and they all are made the same. They are made to go under clothing and not be bulky.

**Q: Can the small size fit 2 year old**
A: Too big for a two year old.

**Q: Where can I find sizing chart? What are the ages/measurements of the garments?**
A: At the bottom/ small, medium, large

**Q: How do you tell what the size range is for small?**
A: By sizing my son to my grand son they are one size off from each other

## Customer Reviews

### ⭐⭐⭐⭐⭐ My little one didn't want to take them off!
*by E***R on January 24, 2023*

I would give 10 stars if I could! I will be ordering more for my little guy. It was a struggle to get him to even let me wash them. He has issues with textures but these were perfect for him in every way. I ordered them for a trip to the mountains, thankfully they arrived 5 mins before we left (my fault for last min ordering). They are not thick and have a thin lining of fleece but they are smooth, soft and kept him very warm and comfortable on our hikes in the cold mountains. He wore them the entire trip barely letting me wash them. They wash well, no shrinking nor fading of the vibrant blue. This is definitely worth every penny. Thank you from me and my little one!

### ⭐⭐⭐⭐⭐ A must have
*by U***E on January 28, 2026*

My son hasn't taking these off since the snow hit! He loves the comfort and warmth.

### ⭐⭐⭐⭐⭐ Perfect for below zero weather
*by G***7 on January 15, 2024*

I got two pairs of thermals for my middle schooler who is on the spectrum and is very picky with what they wear. They absolutely LOVED these thermals and didn’t want to take them off! They fit snug without being constricting and the flat seams do not irritate their skin. My kid is 5’ tall at age eleven and the size Large was perfect. They said they were warm and dry all day even when playing outside in the snow. I will be purchasing another set because the quality is fantastic. Honestly you can’t have enough for your kids especially if they are active.

## Frequently Bought Together

- HEROBIKER Thermal Underwear Boys Ultra Soft Fleece Lined Kids Thermals Long Johns Top Bottom Warm Set for Winter Skiing
- Arctix Kids Insulated Snow Bib Overalls
- wanchel Warm Kids Ski Socks - 2 Pairs Merino Wool Skiing Socks, Winter Warm Snowboard Thermal Socks For Boys Girls Toddlers

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-10-13*