---
title: "Thermal Underwear Womens — £80K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/fashion/thermal-underwear-womens"
last_updated: "2026-07-31T15:17:17.664Z"
locale: en
meta:
description: "Niche score 45/100 · £80K/yr market · 796K searches/yr · £12.86 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 45/100 · £80K/yr market · 796K searches/yr · £12.86 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Thermal Underwear Womens — £80K/yr Amazon UK Niche (2026) - Flapen"
---
# **thermal underwear womens**
**Skip it**
Soft demand (-80.3% this quarter) — this niche doesn't clear our bar today.
Market size 20Growth 0Conversion 10Competition 95Returns 47Price range 53Avg price 57Brand share 86Review moat 40Quality gap 63
**Competition**
**Incredible****19%**
top-5 click share — an open shelf
**Brand share**
**Great****49%**
top-5 brand share — no brand owns this niche
**Quality gap**
**Good****4.4★**
avg incumbent rating — lower means beatable quality
**Avg price**
**Good****£12.86**
avg listing price — sweet spot $15–$100
**Price range**
**Good****£4.90–£26.40**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Returns**
**Okay****3.3%**
return rate — above 5% kills the launch gate
**Review moat**
**Okay****2,527.38**
avg incumbent reviews — the moat a new listing must climb
**Market size**
**Bad****£80K**
£80K/yr · 796K searches
**Conversion**
**Bad****0.8%**
search→purchase rate — share of searches ending in a sale
**Growth**
**Bad****-80.3%**
90-day search growth — must beat 0% to launch
**Signals**[** No Dominant Brand**](https://flapen.com/research/niches?market=uk&signal=no_dominant_brand "Top brand's click share < 20%")
According to Flapen's Amazon United Kingdom niche tracking, thermal underwear womens is a £80K/yr Amazon United Kingdom market (796K searches/yr). The top 5 brands hold 49% of demand. Demand peaks in Jan–Oct–Nov–Dec. Verdict: Skip it — 45/100.
Data updated Jul 23, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **thermal underwear womens market data**
- **Units sold / yr**
- **10K–13K**
- avg 0–100/product
- **Revenue / yr**
- **£129K–£161K**
- units × avg price
- **Conversion rate**
- **0.8%**
- **Avg BSR**
- **#793**
- **Page quality**
- **0%**
- **Prime**
- **90%**
- **Sponsored**
- **79%**
- **Out of stock**
- **34.4%**
- **Avg brand age**
- **40 months**
- **Avg seller age**
- **173 days**
## **Competition & brand share**
Clicks spread well past the top 5 (19% combined) — an open shelf where new products get seen.
**Brands**
**41 **▲rising
**Sellers**
**69**
**Top-5 brand share**
**49%**
Top 20: 86%
**Top-5 click share**
**19%**
Top 20: 41%
**Open market**
**45%**
- TCA18% - NOOYME10% - Undercover8% - Liang Rou7% - wirarpa6% - SIMIYA6%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -80.3% search growth over the last 90 days.
100K60KSpike '24Black Friday '24Spike '25Black Friday '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jan, Oct, Nov, Dec · busiest ÷ quietest = 32.3×
[**Open Trend **](https://flapen.com/research/uk/fashion/thermal-underwear-womens/trend)
## **Top thermal underwear womens search terms**
- **thermal tops womens**161K/yr-90.0%0.7% conv. - **base layer women**41K/yr-68.2%0.4% conv. - **thermal vests for women uk**96K/yr-76.3%1.7% conv. - **thermal top**52K/yr-77.5%0.4% conv. - **thermals womens**44K/yr-74.0%1.6% conv. - **thermal underwear womens**38K/yr-67.1%0.6% conv. - **thermal vest**39K/yr-74.6%0.8% conv. - **thermal long sleeve top women**32K/yr-72.6%0.9% conv. - **thermal base layers women**26K/yr-77.8%1.0% conv. - **womens thermal top**37K/yr-83.6%0.5% conv. [**All search terms **](https://flapen.com/research/uk/fashion/thermal-underwear-womens/search-terms)
## **Top thermal underwear womens 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%2%£2K4%£3K6%£5K8%£6K101001K10K100K 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**TCA Super Thermal Top Women - Ladies Thermal Vest - Thermals Womens - Ski Base Layer Women - Workout Tops for Cold Weather - Black Rock M**TCA**£11.48**4.4★4,690 rev](https://www.amazon.co.uk/dp/B08DDF3ZWX) [2**SIMIYA Thermal Tops Womens Round Neck Soft Base Layers Long Sleeve Top Women Thermal Underwear Shirt Warm Wicking (Black M)**SIMIYA**£9.80**4.5★133 rev](https://www.amazon.co.uk/dp/B0C89DWTHJ) [3**Undercover Lingerie 2 Pack Womens Thermal Built Up Strap Vest White Medium**Undercover**£10.64**4.4★1,846 rev](https://www.amazon.co.uk/dp/B082WDJTLL) [4**TCA Super Thermal Top Women - Ladies Thermal Vest - Thermals Womens - Ski Base Layer Women - Workout Tops for Cold Weather - Black Rock XL**TCA**£11.68**4.4★4,690 rev](https://www.amazon.co.uk/dp/B08DDDG49D) [5**IWOLLENCE Thermal Long Sleeve Top Women Fleece Silk Ladies Crop Thermals Crew Neck Winter Merino Wool Base Layer Undershirt Thermal T Shirts for Women UK with Slimming Seams (Blue L)**IWOLLENCE**£7.17**3.9★65 rev](https://www.amazon.co.uk/dp/B0FK9VB2JM)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**WISMBOX Womens Short Sleeve Compression Base Layer Quick Dry Breathable Gym Top Athletic Running T-Shirt for Yoga Cycling Workout & Outdoor Sports Black**WISMBOX**£9.76**50 rev5mo ago](https://www.amazon.co.uk/dp/B0G4RNTR5H) [**IWOLLENCE Thermal Long Sleeve Top Women Fleece Silk Ladies Crop Thermals Crew Neck Winter Merino Wool Base Layer Undershirt Thermal T Shirts for Women UK with Slimming Seams (Blue L)**IWOLLENCE**£7.17**65 rev10mo ago](https://www.amazon.co.uk/dp/B0FK9VB2JM) [**IWOLLENCE Thermal Long Sleeve Top Women Fleece Silk Ladies Crop Thermals Crew Neck Winter Merino Wool Base Layer Undershirt Thermal T Shirts for Women UK with Slimming Seams (Black L)**IWOLLENCE**£7.04**65 rev10mo ago](https://www.amazon.co.uk/dp/B0FK9M42Q9) [**IWOLLENCE Thermal Long Sleeve Top Women Fleece Silk Ladies Crop Thermals Crew Neck Winter Merino Wool Base Layer Undershirt Thermal T Shirts for Women UK with Slimming Seams (Dark Grey L)**IWOLLENCE**£6.95**65 rev10mo ago](https://www.amazon.co.uk/dp/B0FK9NPH6Z) [**wirarpa Womens Thermal Underwear Set Fleece Lined Top & Bottom Black S**wirarpa**£14.13**416 rev11mo ago](https://www.amazon.co.uk/dp/B0FNR7J342)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**POWER FLOWER Womens Thermal Top Fleece Lined Long Sleeve Thermal Underwear Soft Stretch Winter Base Layer Shirt Warm Thermal Undershirt for Cold Weather (90055-Black L-XL)**POWER FLOWER**£7.22**4.2★**▲ 274%**](https://www.amazon.co.uk/dp/B0CDGQ9K6D) [**WISMBOX Womens Short Sleeve Compression Base Layer Quick Dry Breathable Gym Top Athletic Running T-Shirt for Yoga Cycling Workout & Outdoor Sports Black**WISMBOX**£9.76**4.3★**▲ 255%**](https://www.amazon.co.uk/dp/B0G4RNTR5H) [**IWOLLENCE Thermal Long Sleeve Top Women Fleece Silk Ladies Crop Thermals Crew Neck Winter Merino Wool Base Layer Undershirt Thermal T Shirts for Women UK with Slimming Seams (Dark Grey L)**IWOLLENCE**£6.95**3.9★**▲ 253%**](https://www.amazon.co.uk/dp/B0FK9NPH6Z) [**Vinconie Women Thermal Underwear Winter Long Johns Ladies Cotton Leggings Top M 1 Pack Black**Vinconie**£12.21**4.3★**▲ 229%**](https://www.amazon.co.uk/dp/B074XTGXVC) [**TCA Super Thermal Top Women - Ladies Thermal Vest - Thermals Womens - Ski Base Layer Women - Workout Tops for Cold Weather - Cloud White L**TCA**£10.86**4.4★**▲ 207%**](https://www.amazon.co.uk/dp/B09D3T3KVF)
**~~View all trending →~~**
## **What buyers say about thermal underwear womens**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Warmth**29%
*“really keep you warm”*
**Comfort-Overall**15%
*“Comfy and warm”*
**Size-Overall**11%
*“Fits as expected”*
**Quality-Overall**8%
*“They seem very well made”*
**Value For Money**6%
*“Good value”*
**Soft Feel**5%
*“Lovely and soft”*
**Thickness**3%
*“Lovely thick cozy socks”*
**Material Quality**2%
*“Lovely material”*
**Color**2%
*“Lovely colours”*
**Weather Proof**1%
*“It works miracle during winter”*
### **What buyers complain about **
**Size-Overall**13%
*“a bit big”*
**Quality-Overall**13%
*“Poor Quality”*
**Thickness**9%
*“it doesn't add thickness”*
**Material Quality**6%
*“Material quality is bad”*
**Lining Quality**6%
*“no fleece lining”*
**Warmth**3%
*“it wont keep you warm”*
**Advertised Vs Actual Product**2%
*“Yet another pair of leggings advertised as fleece lined but yet there is none”*
**Comfort-Overall**2%
*“I am a small person so it was draughty”*
**Arm Fit**2%
*“the arm length on them is too short / a couple of inches too short”*
**Durability**1%
*“Bobbles after 1 wear”*
### **Top return reasons **
**Size-Overall**49%
**Material Quality**7%
**Quality-Overall**5%
**Advertised Vs Actual Product**4%
**Thin**4%
**Length**4%
**Gap/Hole**2%
**Warmth**2%
**Comfort-Overall**2%
**Lining Quality**2%
## **Common questions**
- **Is thermal underwear womens profitable to sell on Amazon United Kingdom?**
- The niche generates £80K/yr across 120 tracked products. 0 of 17 products launched in the last 360 days are still selling. 90-day search growth is -80.3%. Flapen's verdict: Skip it (45/100).
- **How competitive is the thermal underwear womens niche?**
- 41 brands and 69 sellers compete. The top 5 products take 19% of clicks and top 5 brands hold 49% of demand.
- **What do buyers complain about in thermal underwear womens?**
- Top complaints mined from reviews: Size-Overall, Quality-Overall, Thickness. The return rate is 3.3%.
- **When does demand for thermal underwear womens peak?**
- Demand peaks in Jan–Oct–Nov–Dec; the busiest month runs 32.3× the quietest.
- **What does it cost to enter the thermal underwear womens niche?**
- Listings span £4.90–£26.40; the average listing price is £12.86 (sweet spot $15–$100). The average incumbent carries 2,527 reviews — the moat a new listing must climb.
## **Related niches in Fashion**
- 69 [**mens boxers**](https://flapen.com/research/uk/fashion/mens-boxers)£2.8M/yr+21.3%**Launch it**- 70 [**sporran**](https://flapen.com/research/uk/fashion/sporran)£67K/yr+166.3%**Worth a look**- 70 [**racer back bra clip**](https://flapen.com/research/uk/fashion/racer-back-bra-clip)£52K/yr+181.5%**Worth a look**- 70 [**aviator sunglasses**](https://flapen.com/research/uk/fashion/aviator-sunglasses)£195K/yr+100.7%**Worth a look**- 70 [**gifts for colleagues**](https://flapen.com/research/uk/fashion/gifts-for-colleagues)£117K/yr+114.0%**Worth a look**- 70 [**mens shorts**](https://flapen.com/research/uk/fashion/mens-shorts)£679K/yr+220.7%**Worth a look**[**All Fashion niches **](https://flapen.com/research/uk/fashion)