---
title: "100% Cotton Long Johns — $0/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/100-cotton-long-johns"
last_updated: "2026-08-09T03:28:13.771Z"
locale: en
meta:
description: "Niche score 34/100 · $0/yr market · 78K searches/yr · $19.53 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 34/100 · $0/yr market · 78K searches/yr · $19.53 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "100% Cotton Long Johns — $0/yr Amazon US Niche (2026) - Flapen"
---
# **100% cotton long johns**
**Skip it**
A small market ($0/yr) — this niche doesn't clear our bar today.
Market size 0Growth 0Conversion 0Competition 83Returns 20Price range 88Avg price 86Brand share 40Review moat 23Quality gap 62
**Price range**
**Great****$10.96–$59.85**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Avg price**
**Great****$19.53**
avg listing price — sweet spot $15–$100
**Competition**
**Great****32%**
top-5 click share — an open shelf
**Quality gap**
**Good****4.4★**
avg incumbent rating — lower means beatable quality
**Brand share**
**Okay****81%**
top-5 brand share — brands hold most of the demand
**Review moat**
**Bad****7,472.5**
avg incumbent reviews — the moat a new listing must climb
**Returns**
**Bad****6.5%**
return rate — above 5% kills the launch gate
**Market size**
**Bad****$0**
$0/yr · 78K searches
**Growth**
**Bad****-80.3%**
90-day search growth — must beat 0% to launch
**Conversion**
**Bad****0.0%**
search→purchase rate — share of searches ending in a sale
**Signals**[** High Returns**](https://flapen.com/research/niches?market=us&signal=high_returns "Return rate > 5%")
According to Flapen's Amazon United States niche tracking, 100% cotton long johns is a $0/yr Amazon United States market (78K searches/yr). The top 5 brands hold 81% of demand. Verdict: Skip it — 34/100.
Data updated Jul 21, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **100% cotton long johns market data**
- **Units sold / yr**
- **1K–2K**
- avg 0–100/product
- **Revenue / yr**
- **$24K–$29K**
- units × avg price
- **Conversion rate**
- **0.0%**
- **Avg BSR**
- **#406**
- **Page quality**
- **0%**
- **Prime**
- **95%**
- **Sponsored**
- **87%**
- **Out of stock**
- **2.4%**
- **Avg brand age**
- **45 months**
- **Avg seller age**
- **180 days**
## **Competition & brand share**
Clicks spread well past the top 5 (32% combined) — an open shelf where new products get seen.
**Brands**
**20 **▲rising
**Sellers**
**35**
**Top-5 brand share**
**81%**
Top 20: 100%
**Top-5 click share**
**32%**
Top 20: 69%
**Open market**
**16%**
- Indera51% - WEERTI14% - wirarpa8% - Lusomch5% - Amazon Essentials4% - Fruit of the Loom3% - Open — no brand owns it (14 brands, 16%)
## **Demand**
Weekly Amazon search volume, last 27 weeks — -80.3% search growth over the last 90 days.
4K3KSpike '26Jan '26Feb '26Mar '26Apr '26May '26May '26Jun '26
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/100-cotton-long-johns/trend)
## **Top 100% cotton long johns search terms**
- **indera thermals for men**28K/yr-81.3%1.0% conv. - **cotton thermal**5K/yr-69.9%0.3% conv. - **100% cotton long johns**10K/yr-86.1%0.0% conv. - **cotton long underwear**4K/yr-60.3%0.0% conv. - **indera**4K/yr-55.7%0.5% conv. - **cotton thermals**7K/yr-84.5%0.4% conv. - **long johns cotton**4K/yr-77.6%0.5% conv. - **indera thermals**4K/yr-81.7%0.0% conv. - **organic cotton thermals for men**4K/yr-90.8%0.0% conv. - **mens cotton thermal set**4K/yr-95.1%4.5% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/100-cotton-long-johns/search-terms)
## **Top 100% cotton long johns products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%3%$06%$09%$012%$0101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Indera Mens Traditional Waffle Thermal Underwear Long Sleeve Shirt Natural 2X**Indera**$13.07**4.1★15,979 rev](https://www.amazon.com/dp/B000G827HK) [2**WEERTI Thermal Underwear for Men Long Johns with Fleece Lined Base Layer Men Cold Weather Top Bottom-Black L**WEERTI**$27.82**4.6★13,949 rev](https://www.amazon.com/dp/B088JYX7YN) [3**Indera Heavyweight Cotton Waffle Long Johns Thermal Undershirt for Men**Indera**$16.10**4.2★4,252 rev](https://www.amazon.com/dp/B000XRG24S) [4**Place and Street Mens Cotton Thermal Underwear Set Shirt Pants Long Johns White**Lusomch**$16.85**4.6★12,385 rev](https://www.amazon.com/dp/B07NP7WNJT) [5**wirarpa Womens Cotton Thermal Underwear Set Long Johns Base Layer Pajama Set for Women Black Top Bottom Size M**wirarpa**$23.77**4.4★761 rev](https://www.amazon.com/dp/B0FJRLDQXN)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Fruit of the Loom Mens Recycled Waffle Thermal Underwear Bottom Natural Medium**Fruit of the Loom**$18.62**24,409 rev9mo ago](https://www.amazon.com/dp/B08D1NSWNT) [**wirarpa Womens Cotton Thermal Underwear Set Long Johns Base Layer Pajama Set for Women Black Top Bottom Size M**wirarpa**$23.77**761 rev12mo ago](https://www.amazon.com/dp/B0FJRLDQXN) [**wirarpa Womens Cotton Thermal Underwear Set Long Johns Base Layer Pajama Set for Women Grey Top Bottom Size S**wirarpa**$22.99**761 rev12mo ago](https://www.amazon.com/dp/B0FJRMVZJ8) [**AMERICAN HEAVEN Mens Base Layer Long Pants | 100% Cotton Thermal Leggings | Multi Pack Colors**AMERICAN HEAVEN**$26.53**73 rev2y ago](https://www.amazon.com/dp/B0D3VQCJKN) [**Goyoma Men Winter Fleece Lined 100% Cotton Thermal Long Johns Top Bottom Underwear Set (as1 alpha x_l regular regular Navy XL)**Goyoma**$20.31**354 rev3y ago](https://www.amazon.com/dp/B0BK2W3NY5)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Indera Mens Traditional Waffle Thermal Underwear Long Sleeve Shirt Heather Grey Large**Indera**$13.14**4.1★**▲ 544%**](https://www.amazon.com/dp/B000V5E5MS) [**Indera Mens Traditional Waffle Thermal Underwear Long Sleeve Shirt Natural 2X**Indera**$13.07**4.1★**▲ 432%**](https://www.amazon.com/dp/B000G827HK) [**WEERTI Thermal Underwear for Women Long Johns with Fleece Lined Base Layer Women Cold Weather Top Bottom-Black M**WEERTI**$26.42**4.5★**▲ 403%**](https://www.amazon.com/dp/B088H5DWV3) [**WEERTI Thermal Underwear for Men Long Johns with Fleece Lined Base Layer Men Cold Weather Top Bottom-Black L**WEERTI**$27.82**4.6★**▲ 381%**](https://www.amazon.com/dp/B088JYX7YN) [**AMERICAN HEAVEN Mens Base Layer Long Pants | 100% Cotton Thermal Leggings | Multi Pack Colors**AMERICAN HEAVEN**$26.53**4.3★**▲ 335%**](https://www.amazon.com/dp/B0D3VQCJKN)
**~~View all trending →~~**
## **What buyers say about 100% cotton long johns**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Warmth**25%
*“Nice and Warm”*
**Size-Overall**21%
*“Fits to size”*
**Quality-Overall**10%
*“well made”*
**Comfort-Overall**9%
*“Comfortable to wear”*
**Value For Money**7%
*“Worth it”*
**Soft Feel**4%
*“Its soft material”*
**Advertised Vs Actual Product**4%
*“As advertised”*
**Material Quality**3%
*“Very nice and soft material”*
**Weather Proof**2%
*“Perfect for Skiing, Outdoor Work, or just everyday cold weather use”*
**Weight Light**2%
*“not noticeably heavy nor light”*
### **What buyers complain about **
**Size-Overall**24%
*“Too tight”*
**Stitch/Finish/Polish**7%
*“Unfortunately I had a seam rip almost immediately”*
**Material Quality**6%
*“Polyester Crap”*
**Quality-Overall**5%
*“Poor quality”*
**Durability**4%
*“Majorly ripped within 2 months”*
**Advertised Vs Actual Product**4%
*“Seller's item description does not match what was received”*
**Comfort-Overall**3%
*“The fabric is also kind of uncomfortable”*
**Color**3%
*“Would like more colors”*
**Thin**3%
*“Ok. Cheap thin”*
**Warmth**2%
*“Needed these today so very unfortunate they won't keep anyone warm”*
### **Top return reasons **
**Size-Overall**54%
**Material Quality**6%
**Waist Fit**6%
**Length**5%
**Chest Fit**4%
**Advertised Vs Actual Product**3%
**Thin**3%
**Warmth**2%
**Thigh Fit**2%
**Value For Money**2%
## **Common questions**
- **Is 100% cotton long johns profitable to sell on Amazon United States?**
- The niche generates $0/yr across 62 tracked products. 3 of 9 products launched in the last 360 days are still selling. 90-day search growth is -80.3%. Flapen's verdict: Skip it (34/100).
- **How competitive is the 100% cotton long johns niche?**
- 20 brands and 35 sellers compete. The top 5 products take 32% of clicks and top 5 brands hold 81% of demand.
- **What do buyers complain about in 100% cotton long johns?**
- Top complaints mined from reviews: Size-Overall, Stitch/Finish/Polish, Material Quality. The return rate is 6.5% — above our launch gate.
- **What does it cost to enter the 100% cotton long johns niche?**
- Listings span $10.96–$59.85; the average listing price is $19.53 (sweet spot $15–$100). The average incumbent carries 7,473 reviews — the moat a new listing must climb.
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