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.

thermal underwear for women

Skip it

Soft demand (-80.3% this quarter) — this niche doesn't clear our bar today.

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

Bad4.6★

avg incumbent rating — lower means beatable quality

Review moat

Bad5,021.08

avg incumbent reviews — the moat a new listing must climb

Competition

Bad79%

top-5 click share — a locked-up shelf

Conversion

Bad0.8%

search→purchase rate — share of searches ending in a sale

Returns

Bad10.6%

return rate — above 5% kills the launch gate

Growth

Bad-80.3%

90-day search growth — must beat 0% to launch

Brand share

Bad100%

top-5 brand share — brand-locked demand

Signals High Returns

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

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

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

79%

Top 20: 100%

Open market

WEERTI52%
Cuddl Duds28%
SIMIYA14%
HiZiTi3%
persimar3%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -80.3% search growth over the last 90 days.

Peak months: Jan, Feb, Nov, Dec · busiest ÷ quietest = 17.9×

Open Trend

Top thermal underwear for women search terms

cuddle duds women645K/yr -73.7%0.1% conv.
thermal underwear for women962K/yr -89.3%0.9% conv.
cuddle duds women pajamas225K/yr -46.0%0.0% conv.
base layer women178K/yr -74.6%0.4% conv.
ropa termica mujer frio227K/yr -75.9%0.2% conv.
long underwear women182K/yr -73.3%0.8% conv.
cuddl duds145K/yr -61.6%0.0% conv.
thermals for women283K/yr -84.6%1.0% conv.
long johns for women thermal358K/yr -90.9%0.8% conv.
womens thermal underwear207K/yr -84.8%0.8% conv.

All 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.

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

WEERTI Thermal Underwear for Women Long Johns with Fleece Lined Base Layer Women Cold Weather Top Bottom-Black M

WEERTI$26.434.5★12,937 rev

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$34.254.7★6,365 rev

SIMIYA Thermal Underwear Set for Women Long Johns with Fleece Lined Long Sleeves Base Layer Set Top Bottom Black

SIMIYA$20.024.6★2,931 rev

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$32.994.7★6,365 rev

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$33.534.7★6,365 rev

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$15.63972 rev

10mo ago

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$44.87232 rev

11mo ago

2 Packs Thermal Underwear for Women Long Johns Set for Cold Weather Base Layer Top & Bottom with Fleece Lined

persimar$28.24139 rev

1y ago

SIMIYA 2 Pack Thermal Underwear for Women Long Johns Winter Warm Fleece Lined Base Layer Set Cold Weather Top and Bottom

SIMIYA$33.321,714 rev

2y ago

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$34.256,365 rev

3y ago

What buyers say about thermal underwear for women

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

What buyers love

Warmth31%

“I love how it feels so warm”

Size-Overall17%

“Fit like a glove”

Comfort-Overall13%

“Comfy and warm”

Quality-Overall8%

“Great quality and ideal for layering”

Soft Feel7%

“Soft and cheery”

Color3%

“Love the color”

Advertised Vs Actual Product2%

“As described”

Weather Proof2%

“Worked well in very cold weather”

Weight Light2%

“it is lightweight feel”

Stretchability/Expandability/Elasticity2%

“Perfect super soft warm stretchy and great fit”

What buyers complain about

Size-Overall19%

“Pants are a little too high”

Thickness7%

“Little thicker than regular thermal underwear”

Smell4%

“it just smells off”

Lining Quality4%

“I would not call this fleece lined”

Material Quality4%

“Horrible material”

Warmth3%

“It's cold”

Stretchability/Expandability/Elasticity3%

“Too stretchy”

Machine Wash Suitability3%

“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 Heavy3%

“Too heavy like silk better”

Ease Of Cleaning3%

“Mine came dirty”

Top return reasons

Size-Overall56%

Length7%

Material Quality6%

Waist Fit6%

Warmth3%

Thin3%

Sleeve Fit2%