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.

100% cotton long johns

Skip it

A small market ($0/yr) — this niche doesn't clear our bar today.

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

Great32%

top-5 click share — an open shelf

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Brand share

Okay81%

top-5 brand share — brands hold most of the demand

Review moat

Bad7,472.5

avg incumbent reviews — the moat a new listing must climb

Returns

Bad6.5%

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

Bad0.0%

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

Signals High Returns

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

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

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.

Open Trend

Top 100% cotton long johns search terms

indera thermals for men28K/yr -81.3%1.0% conv.
cotton thermal5K/yr -69.9%0.3% conv.
100% cotton long johns10K/yr -86.1%0.0% conv.
cotton long underwear4K/yr -60.3%0.0% conv.
indera4K/yr -55.7%0.5% conv.
cotton thermals7K/yr -84.5%0.4% conv.
long johns cotton4K/yr -77.6%0.5% conv.
indera thermals4K/yr -81.7%0.0% conv.
organic cotton thermals for men4K/yr -90.8%0.0% conv.
mens cotton thermal set4K/yr -95.1%4.5% conv.

All 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.

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

Indera Mens Traditional Waffle Thermal Underwear Long Sleeve Shirt Natural 2X

Indera$13.074.1★15,979 rev

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

WEERTI$27.824.6★13,949 rev

Indera Heavyweight Cotton Waffle Long Johns Thermal Undershirt for Men

Indera$16.104.2★4,252 rev

Place and Street Mens Cotton Thermal Underwear Set Shirt Pants Long Johns White

Lusomch$16.854.6★12,385 rev

wirarpa Womens Cotton Thermal Underwear Set Long Johns Base Layer Pajama Set for Women Black Top Bottom Size M

wirarpa$23.774.4★761 rev

Newest

by launch date

Fruit of the Loom Mens Recycled Waffle Thermal Underwear Bottom Natural Medium

Fruit of the Loom$18.6224,409 rev

9mo ago

wirarpa Womens Cotton Thermal Underwear Set Long Johns Base Layer Pajama Set for Women Black Top Bottom Size M

wirarpa$23.77761 rev

12mo ago

wirarpa Womens Cotton Thermal Underwear Set Long Johns Base Layer Pajama Set for Women Grey Top Bottom Size S

wirarpa$22.99761 rev

12mo ago

AMERICAN HEAVEN Mens Base Layer Long Pants | 100% Cotton Thermal Leggings | Multi Pack Colors

AMERICAN HEAVEN$26.5373 rev

2y ago

Goyoma Men Winter Fleece Lined 100% Cotton Thermal Long Johns Top Bottom Underwear Set (as1 alpha x_l regular regular Navy XL)

Goyoma$20.31354 rev

3y ago

What buyers say about 100% cotton long johns

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

What buyers love

Warmth25%

“Nice and Warm”

Size-Overall21%

“Fits to size”

Quality-Overall10%

“well made”

Comfort-Overall9%

“Comfortable to wear”

Value For Money7%

“Worth it”

Soft Feel4%

“Its soft material”

Advertised Vs Actual Product4%

“As advertised”

Material Quality3%

“Very nice and soft material”

Weather Proof2%

“Perfect for Skiing, Outdoor Work, or just everyday cold weather use”

Weight Light2%

“not noticeably heavy nor light”

What buyers complain about

Size-Overall24%

“Too tight”

Stitch/Finish/Polish7%

“Unfortunately I had a seam rip almost immediately”

Material Quality6%

“Polyester Crap”

Quality-Overall5%

“Poor quality”

Durability4%

“Majorly ripped within 2 months”

Advertised Vs Actual Product4%

“Seller's item description does not match what was received”

Comfort-Overall3%

“The fabric is also kind of uncomfortable”

Color3%

“Would like more colors”

Thin3%

“Ok. Cheap thin”

Warmth2%

“Needed these today so very unfortunate they won't keep anyone warm”

Top return reasons

Size-Overall54%

Material Quality6%

Waist Fit6%

Length5%

Chest Fit4%

Advertised Vs Actual Product3%