---
title: "boys long underwear size 10-12 — Niche Verdict: Skip it (42/100) | Amazon United States - Flapen"
canonical_url: "https://flapen.com/amazon/research/us/clothing-shoes-jewelry/boys-long-underwear-size-10-12"
last_updated: "2026-07-10T01:11:44.989Z"
locale: en
meta:
  description: "a small market ($47K/yr) — boys long underwear size 10-12 doesn't clear our bar today."
  "og:description": "a small market ($47K/yr) — boys long underwear size 10-12 doesn't clear our bar today."
  "og:title": "boys long underwear size 10-12 — Niche Verdict: Skip it (42/100) | Amazon United States - Flapen"
---

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# **boys long underwear size 10-12**

**Skip it****42/100 **

a small market ($47K/yr) — boys long underwear size 10-12 doesn't clear our bar today.

**Market/yr**

**$47K**

**Growth (1y)**

**+156.9%**

**Products**

**38**

**Brands**

**20**

was 25 a year ago

**Sellers**

**24**

**Price range**

**$12.12–$32.24**

**Returns**

**6.9%**

**Rating**

**4.7★**

**Skip it**

Scored 42/100 across market size, growth, competition, quality gap, and returns.

Market sizeGrowthCompetitionQuality gapReturns

Market size

**2**

 ×0.30

Growth

**72**

 ×0.30

Competition

**69**

 ×0.20

Quality gap

**20**

 ×0.10

Returns

**41**

 ×0.10

## **Demand**

Weekly Amazon search volume, last 104 weeks — +156.9% year over year.

4K2KPrime Day '24Spike '24Holiday '24Spike '25Prime Day '25Black Friday '25Holiday '25Spike '26Jul '24Nov '24Mar '25Jul '25Nov '25Mar '26

## **Seasonality**

Monthly demand index across the year — 1.00 is average.

JFMAMJJASOND

Peak months: Jan, Feb, Oct, Nov, Dec · busiest ÷ quietest = 14.7×

## **Competition**

- Spyder30% - TELALEO10% - Runhit8% - Rolimaka8% - Ewedoos7% - Cuddl Duds6% - Other (14 brands)31%

The top 5 products take 43% of clicks — established leaders, but buyers still shop beyond them. 20 brands and 24 sellers compete here.

**Brands**

**20 **▼falling

was 25 a year ago

**Sellers**

**24**

**Top 5 brand share**

**63%**

#ProductBrandPriceRatingReviewsClick shareTrend

1
![Spyder Kids Thermal Underwear Set - 2 Piece Soft Stretch Moisture Wicking Girls Boys Thermal Set Long Johns for Kids Size 16-18 Black](https://m.media-amazon.com/images/I/31GMo5D9dzL.jpg) [**Spyder Kids Thermal Underwear Set - 2 Piece Soft Stretch Moisture Wicking Girls Boys Thermal Set Long Johns for Kids Size 16-18 Black**](https://www.amazon.com/dp/B0DJRRFKVB)

Spyder$20.914.7★20818%▲rising

2
![Runhit Thermal Underwear for Kids Long Johns Ultra Soft Long Sleeve Shirts Sets Skiing Base Layer Fleece Lined Pants Suit Black M](https://m.media-amazon.com/images/I/31B0ErLdIGL.jpg) [**Runhit Thermal Underwear for Kids Long Johns Ultra Soft Long Sleeve Shirts Sets Skiing Base Layer Fleece Lined Pants Suit Black M**](https://www.amazon.com/dp/B0CCR8TQTP)

Runhit$12.864.7★6327%▲rising

3
![Spyder Kids Thermal Underwear Set - 2 Piece Soft Stretch Moisture Wicking Girls Boys Thermal Set Long Johns for Kids Size 16-18 Heather Grey](https://m.media-amazon.com/images/I/41bwA6W2DsL.jpg) [**Spyder Kids Thermal Underwear Set - 2 Piece Soft Stretch Moisture Wicking Girls Boys Thermal Set Long Johns for Kids Size 16-18 Heather Grey**](https://www.amazon.com/dp/B0DJRRCMKD)

Spyder$20.494.7★2087%▲rising

4
![TELALEO Boys Girls Thermal Set Fleece Lined Underwear Set Kids Compression Shirts Athletic Sports Tops Leggings Baselayer Shirts/Pants Set M](https://m.media-amazon.com/images/I/31k39ti52HL.jpg) [**TELALEO Boys Girls Thermal Set Fleece Lined Underwear Set Kids Compression Shirts Athletic Sports Tops Leggings Baselayer Shirts/Pants Set M**](https://www.amazon.com/dp/B0841X35YN)

TELALEO$18.554.8★2,9266%▼falling

5
![Ewedoos Thermal Underwear Set for Kids Thermals Top and Bottom Set Boys Long Johns Base Layer Thermal Set Black](https://m.media-amazon.com/images/I/31NH4u4KZ8L.jpg) [**Ewedoos Thermal Underwear Set for Kids Thermals Top and Bottom Set Boys Long Johns Base Layer Thermal Set Black**](https://www.amazon.com/dp/B0CBKND1FK)

Ewedoos$15.914.8★5175%▼falling

6
![TELALEO Boys Girls Thermal Set Fleece Lined Underwear Set Kids Compression Shirts Athletic Sports Tops Leggings Baselayer Shirts/Pants Set S](https://m.media-amazon.com/images/I/31k39ti52HL.jpg) [**TELALEO Boys Girls Thermal Set Fleece Lined Underwear Set Kids Compression Shirts Athletic Sports Tops Leggings Baselayer Shirts/Pants Set S**](https://www.amazon.com/dp/B0841WNG55)

TELALEO$18.644.8★2,9264%▲rising

7
![Dalavch 2 Sets Youth Boys Thermal Base Layer Long Johns Compression Leggings and Shirts Fleece Lined Underwear for Kids Girls 1 Black 1 Heather Grey Medium](https://m.media-amazon.com/images/I/41iy5DKlMFL.jpg) [**Dalavch 2 Sets Youth Boys Thermal Base Layer Long Johns Compression Leggings and Shirts Fleece Lined Underwear for Kids Girls 1 Black 1 Heather Grey Medium**](https://www.amazon.com/dp/B0CH9N7B6X)

Dalavch$25.054.8★3773%▼falling

8
![Rocky Thermal Underwear Kids Boys Thermal Underwear Set Long Johns Thermals Kids Base Layer kid thermals top bottom set Boys Winter Clothes Shirt & Pants Ski/Extreme Cold (Black Large)](https://m.media-amazon.com/images/I/31d4Y2KAkuL.jpg) [**Rocky Thermal Underwear Kids Boys Thermal Underwear Set Long Johns Thermals Kids Base Layer kid thermals top bottom set Boys Winter Clothes Shirt & Pants Ski/Extreme Cold (Black Large)**](https://www.amazon.com/dp/B01M12L67P)

Rocky$23.454.5★5,7483%▼falling

9
![Girls Underwear Kids Thermal Underwears Toddler Winter Base Layer Long Johns Sets for Boys A Black Large (100) /3T-4T](https://m.media-amazon.com/images/I/311q1qrb+rL.jpg) [**Girls Underwear Kids Thermal Underwears Toddler Winter Base Layer Long Johns Sets for Boys A Black Large (100) /3T-4T**](https://www.amazon.com/dp/B09GVXCBMD)

American Trends$16.914.7★1,2103%▲rising

10

![Spyder Kids Thermal Underwear Set - 2 Piece Soft Stretch Moisture Wicking Girls Boys Thermal Set Long Johns for Kids Size 8-10 Black](https://m.media-amazon.com/images/I/31GMo5D9dzL.jpg) [**Spyder Kids Thermal Underwear Set - 2 Piece Soft Stretch Moisture Wicking Girls Boys Thermal Set Long Johns for Kids Size 8-10 Black**](https://www.amazon.com/dp/B0DJRQKW5M)

Spyder$23.034.7★2083%—flat

11

![4 or 3 Pack Youth Boys Compression Leggings Tights Athletic Pants Sports Base Layer for Kids Cold Gear 3 Black M](https://m.media-amazon.com/images/I/31of8ut2+CL.jpg) [**4 or 3 Pack Youth Boys Compression Leggings Tights Athletic Pants Sports Base Layer for Kids Cold Gear 3 Black M**](https://www.amazon.com/dp/B08KF25L9D)

Rolimaka$17.554.7★6,2302%▲rising

12

![G Gradual Youth Boys Compression Thermal Shirt Long Sleeve Fleece Undershirt for Boy Football Baseball Soccer Base Layer(Black L)](https://m.media-amazon.com/images/I/31VO-uzDzaL.jpg) [**G Gradual Youth Boys Compression Thermal Shirt Long Sleeve Fleece Undershirt for Boy Football Baseball Soccer Base Layer(Black L)**](https://www.amazon.com/dp/B0CJ85F6FN)

G Gradual$16.374.8★1,3082%—flat

13

![Hanes Boys Moves Long Leg Boxer Brief Underwear Anti-Chafe Boxer Briefs for Boys Assorted 6-Pack](https://m.media-amazon.com/images/I/41e9rChNGaL.jpg) [**Hanes Boys Moves Long Leg Boxer Brief Underwear Anti-Chafe Boxer Briefs for Boys Assorted 6-Pack**](https://www.amazon.com/dp/B0CVSCCDF2)

Hanes$18.844.7★1,7422%▲rising

14

![HXP Boys Compression Thermal Base Layer Set Athletic Youth Fleece Lined Long Sleeve Sports Tops Leggings for Kids Black M](https://m.media-amazon.com/images/I/31Y4NRK-hjL.jpg) [**HXP Boys Compression Thermal Base Layer Set Athletic Youth Fleece Lined Long Sleeve Sports Tops Leggings for Kids Black M**](https://www.amazon.com/dp/B0G29ZW8F9)

HXP$12.124.7★852%▲rising

15

![Cuddl Duds Boys Heavyweight Fleece Lined 2 Piece Thermal Underwear Set Long Sleeve Shirt & Leggings Base Layer for Cold Weather Winter Clothing Long Johns Lounge Sets for Kids Navy L](https://m.media-amazon.com/images/I/314eueFjpLL.jpg) [**Cuddl Duds Boys Heavyweight Fleece Lined 2 Piece Thermal Underwear Set Long Sleeve Shirt & Leggings Base Layer for Cold Weather Winter Clothing Long Johns Lounge Sets for Kids Navy L**](https://www.amazon.com/dp/B0BV8T385W)

Cuddl Duds$27.544.7★2862%▲rising

**~~Showing 15 of 38 — show all ~~**

## **Product shelf**

All 38 tracked products in this niche.

Top sellersNewestTrending

[![Spyder Kids Thermal Underwear Set - 2 Piece Soft Stretch Moisture Wicking Girls Boys Thermal Set Long Johns for Kids Size 16-18 Black](https://m.media-amazon.com/images/I/31GMo5D9dzL.jpg)**Spyder Kids Thermal Underwear Set - 2 Piece Soft Stretch Moisture Wicking Girls Boys Thermal Set Long Johns for Kids Size 16-18 Black** Spyder**$20.91**4.7★208 reviews](https://www.amazon.com/dp/B0DJRRFKVB) [![Runhit Thermal Underwear for Kids Long Johns Ultra Soft Long Sleeve Shirts Sets Skiing Base Layer Fleece Lined Pants Suit Black M](https://m.media-amazon.com/images/I/31B0ErLdIGL.jpg)**Runhit Thermal Underwear for Kids Long Johns Ultra Soft Long Sleeve Shirts Sets Skiing Base Layer Fleece Lined Pants Suit Black M** Runhit**$12.86**4.7★632 reviews](https://www.amazon.com/dp/B0CCR8TQTP) [![Spyder Kids Thermal Underwear Set - 2 Piece Soft Stretch Moisture Wicking Girls Boys Thermal Set Long Johns for Kids Size 16-18 Heather Grey](https://m.media-amazon.com/images/I/41bwA6W2DsL.jpg)**Spyder Kids Thermal Underwear Set - 2 Piece Soft Stretch Moisture Wicking Girls Boys Thermal Set Long Johns for Kids Size 16-18 Heather Grey** Spyder**$20.49**4.7★208 reviews](https://www.amazon.com/dp/B0DJRRCMKD) [![TELALEO Boys Girls Thermal Set Fleece Lined Underwear Set Kids Compression Shirts Athletic Sports Tops Leggings Baselayer Shirts/Pants Set M](https://m.media-amazon.com/images/I/31k39ti52HL.jpg)**TELALEO Boys Girls Thermal Set Fleece Lined Underwear Set Kids Compression Shirts Athletic Sports Tops Leggings Baselayer Shirts/Pants Set M** TELALEO**$18.55**4.8★2,926 reviews](https://www.amazon.com/dp/B0841X35YN) [![Ewedoos Thermal Underwear Set for Kids Thermals Top and Bottom Set Boys Long Johns Base Layer Thermal Set Black](https://m.media-amazon.com/images/I/31NH4u4KZ8L.jpg)**Ewedoos Thermal Underwear Set for Kids Thermals Top and Bottom Set Boys Long Johns Base Layer Thermal Set Black** Ewedoos**$15.91**4.8★517 reviews](https://www.amazon.com/dp/B0CBKND1FK) [![TELALEO Boys Girls Thermal Set Fleece Lined Underwear Set Kids Compression Shirts Athletic Sports Tops Leggings Baselayer Shirts/Pants Set S](https://m.media-amazon.com/images/I/31k39ti52HL.jpg)**TELALEO Boys Girls Thermal Set Fleece Lined Underwear Set Kids Compression Shirts Athletic Sports Tops Leggings Baselayer Shirts/Pants Set S** TELALEO**$18.64**4.8★2,926 reviews](https://www.amazon.com/dp/B0841WNG55) [![Dalavch 2 Sets Youth Boys Thermal Base Layer Long Johns Compression Leggings and Shirts Fleece Lined Underwear for Kids Girls 1 Black 1 Heather Grey Medium](https://m.media-amazon.com/images/I/41iy5DKlMFL.jpg)**Dalavch 2 Sets Youth Boys Thermal Base Layer Long Johns Compression Leggings and Shirts Fleece Lined Underwear for Kids Girls 1 Black 1 Heather Grey Medium** Dalavch**$25.05**4.8★377 reviews](https://www.amazon.com/dp/B0CH9N7B6X) [![Rocky Thermal Underwear Kids Boys Thermal Underwear Set Long Johns Thermals Kids Base Layer kid thermals top bottom set Boys Winter Clothes Shirt & Pants Ski/Extreme Cold (Black Large)](https://m.media-amazon.com/images/I/31d4Y2KAkuL.jpg)**Rocky Thermal Underwear Kids Boys Thermal Underwear Set Long Johns Thermals Kids Base Layer kid thermals top bottom set Boys Winter Clothes Shirt & Pants Ski/Extreme Cold (Black Large)** Rocky**$23.45**4.5★5,748 reviews](https://www.amazon.com/dp/B01M12L67P)

## **Reviews**

What buyers praise and complain about, mined from review topics.

### **What buyers love **

**Size-Overall**23%

*“Fit great”*

**Warmth**19%

*“Keep warm”*

**Comfort-Overall**13%

*“Very comfortable”*

**Quality-Overall**11%

*“Excellent quality, perfect fit, delivered just in time”*

**Soft Feel**5%

*“Soft and comfortable”*

**Value For Money**3%

*“Affordable long underwear for kids”*

**Durability**2%

*“Durable, good quality”*

**Material Quality**2%

*“The material was comfortable”*

**Stretchability/Expandability/Elasticity**2%

*“Nice stretch too”*

**Moist/Dry**1%

*“The moisture-wicking feature works great for an active boy”*

### **What buyers complain about **

**Size-Overall**23%

*“Size is 2 sizes tighter than it shouldve been”*

**Quality-Overall**13%

*“Disappointing Quality for Kids' Thermal Set”*

**Material Quality**11%

*“Cheap material”*

**Thickness**4%

*“The material isnt too thick”*

**Waist Fit**4%

*“And while the waist fits the length is way too short”*

**Length**4%

*“Very long”*

**Sleeve Fit**2%

*“it was sorta long on the sleeves I had to fold them”*

**Smell**2%

*“smells chemically out of package”*

**Stretchability/Expandability/Elasticity**2%

*“the set hasnt stretched out”*

**Thin**1%

*“Just a little thin”*

#### **Top return reasons**- Size-Overall62% - Length7% - Waist Fit7% - Material Quality3% - Sleeve Fit2% - Thigh Fit2% - Advertised Vs Actual Product2% - Thin1% - Value For Money1% - Compression1%