---
title: "Thermal Underwear for Women — $1.0M/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/thermal-underwear-for-women"
last_updated: "2026-08-06T10:42:45.901Z"
locale: en
meta:
description: "Niche score 29/100 · $1.0M/yr market · 4.3M searches/yr · $29.17 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 29/100 · $1.0M/yr market · 4.3M searches/yr · $29.17 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Thermal Underwear for Women — $1.0M/yr Amazon US Niche (2026) - Flapen"
---
# **thermal underwear for women**
**Skip it**
Soft demand (-80.3% this quarter) — this niche doesn't clear our bar today.
Market size 78Growth 0Conversion 10Competition 18Returns 5Price range 95Avg price 95Brand share 0Review moat 24Quality gap 24
**Avg price**
**Incredible****$29.17**
avg listing price — sweet spot $15–$100
**Price range**
**Incredible****$15.63–$44.87**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Market size**
**Great****$1.0M**
$1.0M/yr · 4.3M searches
**Quality gap**
**Bad****4.6★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Bad****5,021.08**
avg incumbent reviews — the moat a new listing must climb
**Competition**
**Bad****79%**
top-5 click share — a locked-up shelf
**Conversion**
**Bad****0.8%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Bad****10.6%**
return rate — above 5% kills the launch gate
**Growth**
**Bad****-80.3%**
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 women is a $1.0M/yr Amazon United States market (4.3M searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Jan–Feb–Nov–Dec. Verdict: Skip it — 29/100.
Data updated Jul 14, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **thermal underwear for women market data**
- **Units sold / yr**
- **50K–60K**
- avg 1,250–1,500/product
- **Revenue / yr**
- **$1.5M–$1.8M**
- units × avg price
- **Conversion rate**
- **0.8%**
- **Avg BSR**
- **#59**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **100%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **44 months**
- **Avg seller age**
- **142 days**
## **Competition & brand share**
The top 5 products capture 79% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**5 **▼falling
**Sellers**
**9**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**79%**
Top 20: 100%
**Open market**
**0%**
- WEERTI52% - Cuddl Duds28% - SIMIYA14% - HiZiTi3% - persimar3%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -80.3% search growth over the last 90 days.
350K250KPrime Day '24Spike '24Holiday '24Spike '25Prime Day '25Black Friday '25Holiday '25 seasonSepDecMarJunAugNovMarMay
Peak months: Jan, Feb, Nov, Dec · busiest ÷ quietest = 17.9×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/thermal-underwear-for-women/trend)
## **Top thermal underwear for women search terms**
- **cuddle duds women**645K/yr-73.7%0.1% conv. - **thermal underwear for women**962K/yr-89.3%0.9% conv. - **cuddle duds women pajamas**225K/yr-46.0%0.0% conv. - **base layer women**178K/yr-74.6%0.4% conv. - **ropa termica mujer frio**227K/yr-75.9%0.2% conv. - **long underwear women**182K/yr-73.3%0.8% conv. - **cuddl duds**145K/yr-61.6%0.0% conv. - **thermals for women**283K/yr-84.6%1.0% conv. - **long johns for women thermal**358K/yr-90.9%0.8% conv. - **womens thermal underwear**207K/yr-84.8%0.8% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/thermal-underwear-for-women/search-terms)
## **Top thermal underwear for women 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%15%$155K30%$310K45%$465K60%$619K1001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 12 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**WEERTI Thermal Underwear for Women Long Johns with Fleece Lined Base Layer Women Cold Weather Top Bottom-Black M**WEERTI**$26.43**4.5★12,937 rev](https://www.amazon.com/dp/B088H5DWV3) [2**Cuddl Duds Womens Heavyweight Fleece 2 Piece Long Sleeve Thermal Underwear Set Shirt & Leggings Base Layer for Cold Weather Winter Clothing Long Johns Lounge Sets for Women Black M**Cuddl Duds**$34.25**4.7★6,365 rev](https://www.amazon.com/dp/B0BV8QGYDY) [3**SIMIYA Thermal Underwear Set for Women Long Johns with Fleece Lined Long Sleeves Base Layer Set Top Bottom Black**SIMIYA**$20.02**4.6★2,931 rev](https://www.amazon.com/dp/B09FKZLFSB) [4**Cuddl Duds Womens Heavyweight Fleece 2 Piece Long Sleeve Thermal Underwear Set Shirt & Leggings Base Layer for Cold Weather Winter Clothing Long Johns Lounge Sets for Women Navy Blue XL**Cuddl Duds**$32.99**4.7★6,365 rev](https://www.amazon.com/dp/B0BV8NVSKM) [5**Cuddl Duds Womens Heavyweight Fleece 2 Piece Long Sleeve Thermal Underwear Set Shirt & Leggings Base Layer for Cold Weather Winter Clothing Long Johns Lounge Sets for Women Purple L**Cuddl Duds**$33.53**4.7★6,365 rev](https://www.amazon.com/dp/B0BV87W71L)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**HiZiTi Thermal Underwear for Women Long Johns Set Fleece Lined Warm Black Base Layer Long Sleeve Shirt Leggings for Cold Weather Top & Bottom Skiing Pajama Winter M**HiZiTi**$15.63**972 rev10mo ago](https://www.amazon.com/dp/B0FHKLSDR4) [**Cuddl Duds Womens 2 Piece Pajamas & Lounge Set - Cozy Soft Long Sleeve Sleepwear & Loungewear - Button Down Sleep Shirt & Long Pajama Pants with Pockets PJs Sets for Women Floral Ditsy M**Cuddl Duds**$44.87**232 rev11mo ago](https://www.amazon.com/dp/B0FLMPJVM3) [**2 Packs Thermal Underwear for Women Long Johns Set for Cold Weather Base Layer Top & Bottom with Fleece Lined**persimar**$28.24**139 rev1y ago](https://www.amazon.com/dp/B0FDWLWL6S) [**SIMIYA 2 Pack Thermal Underwear for Women Long Johns Winter Warm Fleece Lined Base Layer Set Cold Weather Top and Bottom**SIMIYA**$33.32**1,714 rev2y ago](https://www.amazon.com/dp/B0CC4TCLC3) [**Cuddl Duds Womens Heavyweight Fleece 2 Piece Long Sleeve Thermal Underwear Set Shirt & Leggings Base Layer for Cold Weather Winter Clothing Long Johns Lounge Sets for Women Black M**Cuddl Duds**$34.25**6,365 rev3y ago](https://www.amazon.com/dp/B0BV8QGYDY)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**SIMIYA Thermal Underwear Set for Women Long Johns with Fleece Lined Long Sleeves Base Layer Set Top Bottom Grey**SIMIYA**$20.49**4.6★**▲ 220%**](https://www.amazon.com/dp/B0B6C7NC1H) [**2 Packs Thermal Underwear for Women Long Johns Set for Cold Weather Base Layer Top & Bottom with Fleece Lined**persimar**$28.24**4.5★**▲ 146%**](https://www.amazon.com/dp/B0FDWLWL6S) [**Cuddl Duds Womens 2 Piece Pajamas & Lounge Set - Cozy Soft Long Sleeve Sleepwear & Loungewear - Button Down Sleep Shirt & Long Pajama Pants with Pockets PJs Sets for Women Floral Ditsy M**Cuddl Duds**$44.87**4.7★**▲ 118%**](https://www.amazon.com/dp/B0FLMPJVM3) [**Cuddl Duds Womens Heavyweight Fleece 2 Piece Long Sleeve Thermal Underwear Set Shirt & Leggings Base Layer for Cold Weather Winter Clothing Long Johns Lounge Sets for Women Purple M**Cuddl Duds**$33.63**4.7★**▲ 74%**](https://www.amazon.com/dp/B0BV8LMXGN) [**WEERTI Thermal Underwear for Women Long Johns with Fleece Lined Base Layer Women Cold Weather Top Bottom-Black M**WEERTI**$26.43**4.5★**▲ 10%**](https://www.amazon.com/dp/B088H5DWV3)
**~~View all trending →~~**
## **What buyers say about thermal underwear for women**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Warmth**31%
*“I love how it feels so warm”*
**Size-Overall**17%
*“Fit like a glove”*
**Comfort-Overall**13%
*“Comfy and warm”*
**Quality-Overall**8%
*“Great quality and ideal for layering”*
**Soft Feel**7%
*“Soft and cheery”*
**Color**3%
*“Love the color”*
**Advertised Vs Actual Product**2%
*“As described”*
**Weather Proof**2%
*“Worked well in very cold weather”*
**Weight Light**2%
*“it is lightweight feel”*
**Stretchability/Expandability/Elasticity**2%
*“Perfect super soft warm stretchy and great fit”*
### **What buyers complain about **
**Size-Overall**19%
*“Pants are a little too high”*
**Thickness**7%
*“Little thicker than regular thermal underwear”*
**Smell**4%
*“it just smells off”*
**Lining Quality**4%
*“I would not call this fleece lined”*
**Material Quality**4%
*“Horrible material”*
**Warmth**3%
*“It's cold”*
**Stretchability/Expandability/Elasticity**3%
*“Too stretchy”*
**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”*
**Weight Heavy**3%
*“Too heavy like silk better”*
**Ease Of Cleaning**3%
*“Mine came dirty”*
### **Top return reasons **
**Size-Overall**56%
**Length**7%
**Material Quality**6%
**Waist Fit**6%
**Warmth**3%
**Thin**3%
**Sleeve Fit**2%
**Advertised Vs Actual Product**2%
**Thigh Fit**2%
**Value For Money**2%
## **Common questions**
- **Is thermal underwear for women profitable to sell on Amazon United States?**
- The niche generates $1.0M/yr across 12 tracked products. 1 of 2 products launched in the last 360 days are still selling. 90-day search growth is -80.3%. Flapen's verdict: Skip it (29/100).
- **How competitive is the thermal underwear for women niche?**
- 5 brands and 9 sellers compete. The top 5 products take 79% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in thermal underwear for women?**
- Top complaints mined from reviews: Size-Overall, Thickness, Smell. The return rate is 10.6% — above our launch gate.
- **When does demand for thermal underwear for women peak?**
- Demand peaks in Jan–Feb–Nov–Dec; the busiest month runs 17.9× the quietest.
- **What does it cost to enter the thermal underwear for women niche?**
- Listings span $15.63–$44.87; the average listing price is $29.17 (sweet spot $15–$100). The average incumbent carries 5,021 reviews — the moat a new listing must climb.
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