---
title: "Thermal Underwear for Men — $1.9M/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/thermal-underwear-for-men"
last_updated: "2026-08-09T20:48:42.466Z"
locale: en
meta:
description: "Niche score 31/100 · $1.9M/yr market · 7.0M searches/yr · $19.94 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 31/100 · $1.9M/yr market · 7.0M searches/yr · $19.94 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Thermal Underwear for Men — $1.9M/yr Amazon US Niche (2026) - Flapen"
---
# **thermal underwear for men**
**Skip it**
Soft demand (-86.3% this quarter) — this niche doesn't clear our bar today.
Market size 93Growth 0Conversion 17Competition 6Returns 19Price range 68Avg price 87Brand share 0Review moat 22Quality gap 37
**Market size**
**Great****$1.9M**
$1.9M/yr · 7.0M searches
**Avg price**
**Great****$19.94**
avg listing price — sweet spot $15–$100
**Price range**
**Good****$8.91–$27.82**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Bad****9,521.43**
avg incumbent reviews — the moat a new listing must climb
**Returns**
**Bad****6.7%**
return rate — above 5% kills the launch gate
**Conversion**
**Bad****1.3%**
search→purchase rate — share of searches ending in a sale
**Competition**
**Bad****93%**
top-5 click share — a locked-up shelf
**Growth**
**Bad****-86.3%**
90-day search growth — must beat 0% to launch
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
**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, thermal underwear for men is a $1.9M/yr Amazon United States market (7.0M searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Jan–Feb–Nov–Dec. Verdict: Skip it — 31/100.
Data updated Jul 21, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **thermal underwear for men market data**
- **Units sold / yr**
- **100K–125K**
- avg 6,000–8,000/product
- **Revenue / yr**
- **$2.0M–$2.5M**
- units × avg price
- **Conversion rate**
- **1.3%**
- **Avg BSR**
- **#8**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **100%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **47 months**
- **Avg seller age**
- **148 days**
## **Competition & brand share**
The top 5 products capture 93% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**5 **▼falling
**Sellers**
**12**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**93%**
Top 20: 100%
**Open market**
**0%**
- WEERTI75% - JZCreater12% - NY Threads6% - CL convallaria4% - Fruit of the Loom4%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -86.3% search growth over the last 90 days.
700K500KSpike '24Holiday '24Spike '25Prime Day '25Black Friday '25Holiday '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jan, Feb, Nov, Dec · busiest ÷ quietest = 31.1×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/thermal-underwear-for-men/trend)
## **Top thermal underwear for men search terms**
- **thermal underwear for men**1.6M/yr-92.8%1.1% conv. - **thermal**359K/yr-59.1%0.1% conv. - **long johns for men thermal**946K/yr-92.0%1.0% conv. - **long underwear mens**379K/yr-83.4%0.9% conv. - **mens thermal underwear**516K/yr-88.9%0.7% conv. - **thermals for men**417K/yr-85.3%0.7% conv. - **long johns**370K/yr-86.3%0.5% conv. - **base layer men**213K/yr-78.6%0.5% conv. - **thermals**258K/yr-79.7%0.4% conv. - **thermal pants men**312K/yr-86.9%0.6% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/thermal-underwear-for-men/search-terms)
## **Top thermal underwear for men 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%20%$376K40%$751K60%$1.1M80%$1.5M101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 7 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**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) [2**JZCreater Thermal Underwear for Men Mens Long Johns Thermal Underwear Set Fleece Lined Base Layer for Cold Weather Black**JZCreater**$16.08**4.6★3,126 rev](https://www.amazon.com/dp/B0816ZY5BK) [3**WEERTI Thermal Underwear for Women Long Johns with Fleece Lined Base Layer Women Cold Weather Top Bottom-Black M**WEERTI**$26.42**4.5★12,952 rev](https://www.amazon.com/dp/B088H5DWV3) [4**NY Threads Thermal Underwear for Men Mens Long Johns Set Base Layer Top and Bottom for Cold Weather Small Black**NY Threads**$8.91**4.3★52 rev](https://www.amazon.com/dp/B0FP56874D) [5**CL convallaria Thermal Underwear for Men Long Johns Winter Hunting Gear Sport Base Layer Top and Bottom Set Midweight Black L**CL convallaria**$22.16**4.6★11,830 rev](https://www.amazon.com/dp/B08DQYVLZ4)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Fruit of The Loom Mens Recycled Waffle Thermal Underwear Bottom Black Medium**Fruit of the Loom**$17.51**24,409 rev9mo ago](https://www.amazon.com/dp/B08D2Q4NDZ) [**NY Threads Thermal Underwear for Men Mens Long Johns Set Base Layer Top and Bottom for Cold Weather Small Black**NY Threads**$8.91**52 rev10mo ago](https://www.amazon.com/dp/B0FP56874D) [**1 or 3 Pack Mens Long Johns Thermal Pants Fleece Lined Lightweight Base Layer Bottoms Compression Leggings Winter Gear**JZCreater**$20.66**332 rev1y ago](https://www.amazon.com/dp/B0DKP7S34Y) [**CL convallaria Thermal Underwear for Men Long Johns Winter Hunting Gear Sport Base Layer Top and Bottom Set Midweight Black L**CL convallaria**$22.16**11,830 rev5y ago](https://www.amazon.com/dp/B08DQYVLZ4) [**WEERTI Thermal Underwear for Men Long Johns with Fleece Lined Base Layer Men Cold Weather Top Bottom-Black L**WEERTI**$27.82**13,949 rev6y ago](https://www.amazon.com/dp/B088JYX7YN)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**NY Threads Thermal Underwear for Men Mens Long Johns Set Base Layer Top and Bottom for Cold Weather Small Black**NY Threads**$8.91**4.3★**▲ 405%**](https://www.amazon.com/dp/B0FP56874D) [**WEERTI Thermal Underwear for Women Long Johns with Fleece Lined Base Layer Women Cold Weather Top Bottom-Black M**WEERTI**$26.42**4.5★**▲ 116%**](https://www.amazon.com/dp/B088H5DWV3) [**1 or 3 Pack Mens Long Johns Thermal Pants Fleece Lined Lightweight Base Layer Bottoms Compression Leggings Winter Gear**JZCreater**$20.66**4.5★**▲ 102%**](https://www.amazon.com/dp/B0DKP7S34Y) [**WEERTI Thermal Underwear for Men Long Johns with Fleece Lined Base Layer Men Cold Weather Top Bottom-Black L**WEERTI**$27.82**4.6★**— 7%**](https://www.amazon.com/dp/B088JYX7YN) [**JZCreater Thermal Underwear for Men Mens Long Johns Thermal Underwear Set Fleece Lined Base Layer for Cold Weather Black**JZCreater**$16.08**4.6★**— 7%**](https://www.amazon.com/dp/B0816ZY5BK)
**~~View all trending →~~**
## **What buyers say about thermal underwear for men**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Warmth**33%
*“Nice and Warm”*
**Size-Overall**15%
*“Nice and snug”*
**Comfort-Overall**11%
*“Comfortable to wear”*
**Quality-Overall**7%
*“well made”*
**Value For Money**5%
*“Worth it”*
**Soft Feel**5%
*“So soft”*
**Advertised Vs Actual Product**4%
*“Just as advertised”*
**Weather Proof**3%
*“it has stood him in good stead in below-freezing temperatures”*
**Weight Light**2%
*“not heavy”*
**Material Quality**2%
*“Super warm material”*
### **What buyers complain about **
**Size-Overall**14%
*“Recommend sizing up as its tight”*
**Material Quality**8%
*“due to the material thinness”*
**Comfort-Overall**4%
*“the waist band is very uncomfortable”*
**Thickness**3%
*“Thicker than I expected”*
**Lining Quality**3%
*“The inner lining is a brushed texture”*
**Ease Of Cleaning**3%
*“Mine came dirty”*
**Color**3%
*“Go for any color other than black if you're going to get some”*
**Ease Of Use**3%
*“Very inconvenient”*
**Machine Wash Suitability**3%
*“After washing 2 times with my work clothes, I felt like my work clothes got the micro fibers stuck to them and it was poking me all night”*
**Stitch/Finish/Polish**3%
*“The stitching is improperly done, with loose threads unraveling at the edges and seams”*
### **Top return reasons **
**Size-Overall**52%
**Waist Fit**6%
**Material Quality**6%
**Length**6%
**Chest Fit**4%
**Thin**3%
**Warmth**3%
**Advertised Vs Actual Product**3%
**Value For Money**2%
**Sleeve Fit**2%
## **Common questions**
- **Is thermal underwear for men profitable to sell on Amazon United States?**
- The niche generates $1.9M/yr across 7 tracked products. 1 of 2 products launched in the last 360 days are still selling. 90-day search growth is -86.3%. Flapen's verdict: Skip it (31/100).
- **How competitive is the thermal underwear for men niche?**
- 5 brands and 12 sellers compete. The top 5 products take 93% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in thermal underwear for men?**
- Top complaints mined from reviews: Size-Overall, Material Quality, Comfort-Overall. The return rate is 6.7% — above our launch gate.
- **When does demand for thermal underwear for men peak?**
- Demand peaks in Jan–Feb–Nov–Dec; the busiest month runs 31.1× the quietest.
- **What does it cost to enter the thermal underwear for men niche?**
- Listings span $8.91–$27.82; the average listing price is $19.94 (sweet spot $15–$100). The average incumbent carries 9,521 reviews — the moat a new listing must climb.
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