Is thermajohn profitable to sell on Amazon United States?

The niche generates $27K/yr across 58 tracked products. 4 of 5 products launched in the last 360 days are still selling. 90-day search growth is -71.8%. Flapen's verdict: Skip it (33/100).

How competitive is the thermajohn niche?

32 brands and 117 sellers compete. The top 5 products take 41% of clicks and top 5 brands hold 59% of demand.

What do buyers complain about in thermajohn?

Top complaints mined from reviews: Size-Overall, Thickness, Quality-Overall. The return rate is 6.9% — above our launch gate.

When does demand for thermajohn peak?

Demand peaks in Jan–Feb–Nov–Dec; the busiest month runs 17.2× the quietest.

What does it cost to enter the thermajohn niche?

Listings span $8.49–$278.82; the average listing price is $43.73 (sweet spot $15–$100). The average incumbent carries 6,974 reviews — the moat a new listing must climb.

thermajohn

Skip it

Soft demand (-71.8% this quarter) — this niche doesn't clear our bar today.

Avg price

Incredible$43.73

avg listing price — sweet spot $15–$100

Brand share

Great59%

top-5 brand share — no brand owns this niche

Competition

Good41%

top-5 click share — leaders hold, buyers still browse

Quality gap

Okay4.6★

avg incumbent rating — lower means beatable quality

Price range

Okay$8.49–$278.82

cheapest to priciest tracked listing — scored on the share inside $15–$100

Review moat

Bad6,974.21

avg incumbent reviews — the moat a new listing must climb

Returns

Bad6.9%

return rate — above 5% kills the launch gate

Conversion

Bad0.6%

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

Market size

Bad$27K

$27K/yr · 100K searches

Growth

Bad-71.8%

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

Signals High Returns

According to Flapen's Amazon United States niche tracking, thermajohn is a $27K/yr Amazon United States market (100K searches/yr). The top 5 brands hold 59% of demand. Demand peaks in Jan–Feb–Nov–Dec. Verdict: Skip it — 33/100.

Data updated Jul 14, 2026 · scored weekly · How we score niches

thermajohn market data

Units sold / yr: 1K–1K; avg 0–100/product
Revenue / yr: $44K–$55K; units × avg price
Conversion rate: 0.6%
Avg BSR: #3,608
Page quality: 0%
Prime: 90%
Sponsored: 79%
Out of stock: 3.3%
Avg brand age: 45 months
Avg seller age: 152 days

Competition & brand share

The top 5 products take 41% of clicks — established leaders, but buyers still shop beyond them.

Brands

32 rising

Sellers

117

Top-5 brand share

59%

Top 20: 91%

Top-5 click share

41%

Top 20: 70%

Open market

37%

WEERTI30%
CL convallaria12%
Carhartt8%
Cuddl Duds5%
Merino.tech4%
WICKED STOCK4%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -71.8% search growth over the last 90 days.

Peak months: Jan, Feb, Nov, Dec · busiest ÷ quietest = 17.2×

Open Trend

Top thermajohn search terms

motorcycle base layer7K/yr +53.0%0.1% conv.
moisture wicking base layer8K/yr -11.3%0.0% conv.
lightweight base layer men5K/yr -46.7%0.3% conv.
hiking base layer men3K/yr -22.9%1.2% conv.
hot chillys thermals womens11K/yr -90.3%0.8% conv.
hot chilis thermals women10K/yr -91.1%0.2% conv.
hunting base layer men16K/yr -70.7%0.0% conv.
running base layer3K/yr -53.7%0.7% conv.
warm base layer4K/yr -72.1%0.4% conv.
base layer set4K/yr -79.8%0.8% conv.

All search terms

Top thermajohn 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

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

WEERTI$27.814.5★13,922 rev

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

CL convallaria Thermal Underwear for Men Long Johns Winter Hunting Gear Sport Base Layer Top and Bottom Set Midweight Black L

CL convallaria$22.154.6★11,805 rev

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

WEERTI$27.864.5★13,922 rev

Carhartt Mens Force Midweight Stretch Base Layer Crewneck Black Heather X-Large

Carhartt$25.845.0★28 rev

Newest

by launch date

KEMIMOTO Motorcycle Mesh Armored Shirt for Men with CE1 Certified Protective Gear Breathable Soft for All Seasons Suitable for Motorcycling Riding Cycling Off-Road Sports

KEMIMOTO$66.1328 rev

4mo ago

KEMIMOTO Motorcycle Jacket Men with CE Armor ESA Rebound Material Breathable Motorcyce Mesh Jacket

KEMIMOTO$79.2923 rev

7mo ago

Compression Shirts for Men - Long Sleeve Black Workout Base Layer Athletic Gym Tops Quick Dry Running Undershirts

BOOJO$8.49310 rev

11mo ago

X-thud Breathable Mens Long Sleeve Base Layer Shirt - Quick Dry & Moisture Wicking for Sports Hiking Gym Black XL

X-thud$9.9984 rev

1y ago

Carhartt Mens Force Midweight Stretch Base Layer Crewneck Black Heather X-Large

Carhartt$25.8428 rev

1y ago

What buyers say about thermajohn

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

What buyers love

Warmth22%

“Toasty warm”

Size-Overall21%

“fits as expected”

Quality-Overall11%

“The quality is solid”

Comfort-Overall9%

“Comfortable to wear”

Value For Money5%

“they are affordable”

Soft Feel5%

“Its very soft”

Material Quality3%

“The material is strong”

Advertised Vs Actual Product3%

“Just what I wanted”

Weight Light2%

“The shirts are light weight”

Weather Proof2%

“Perfect for around the house or non extreme weather”

What buyers complain about

Size-Overall26%

“Too short”

Thickness4%

“Too thick for regular shoes”

Quality-Overall4%

“Poor performance”

Material Quality3%

“This type of material has a tendency to hold pissy smells”

Warmth3%

“Would not recommend for warmth”

Stitch/Finish/Polish3%

“causing the stitching to come apart”

Durability3%

“Ruined after one day”

Smell2%

“it has a strange smell”

Color2%

“its not really black its more of a dark gray”

Comfort-Overall2%

“not very comfortable”

Top return reasons

Size-Overall56%

Length5%

Material Quality5%

Waist Fit5%

Chest Fit4%

Thin3%

Advertised Vs Actual Product2%

Sleeve Fit2%

Warmth2%

Compression2%

Common questions

Is thermajohn profitable to sell on Amazon United States?: The niche generates $27K/yr across 58 tracked products. 4 of 5 products launched in the last 360 days are still selling. 90-day search growth is -71.8%. Flapen's verdict: Skip it (33/100).
How competitive is the thermajohn niche?: 32 brands and 117 sellers compete. The top 5 products take 41% of clicks and top 5 brands hold 59% of demand.
What do buyers complain about in thermajohn?: Top complaints mined from reviews: Size-Overall, Thickness, Quality-Overall. The return rate is 6.9% — above our launch gate.
When does demand for thermajohn peak?: Demand peaks in Jan–Feb–Nov–Dec; the busiest month runs 17.2× the quietest.
What does it cost to enter the thermajohn niche?: Listings span $8.49–$278.82; the average listing price is $43.73 (sweet spot $15–$100). The average incumbent carries 6,974 reviews — the moat a new listing must climb.