Is ninjamas boys l/xl profitable to sell on Amazon United States?

The niche generates $374K/yr across 12 tracked products. 2 of 3 products launched in the last 360 days are still selling. 90-day search growth is +9.5%. Flapen's verdict: Worth a look (51/100).

How competitive is the ninjamas boys l/xl niche?

7 brands and 21 sellers compete. The top 5 products take 78% of clicks and top 5 brands hold 94% of demand.

What do buyers complain about in ninjamas boys l/xl?

Top complaints mined from reviews: Leak-Proof, Size-Overall, Value For Money. The return rate is 0.6%.

When does demand for ninjamas boys l/xl peak?

Demand peaks in Jan–Jun–Dec; the busiest month runs 6.2× the quietest.

What does it cost to enter the ninjamas boys l/xl niche?

Listings span $9.63–$62.14; the average listing price is $36.78 (sweet spot $15–$100). The average incumbent carries 11,706 reviews — the moat a new listing must climb.

ninjamas boys l/xl

Worth a look

Shows searches that convert (16.1% search→purchase), but brand-locked demand (top 5 brands take 94% of clicks) keeps it on the watch list.

Conversion

Incredible16.1%

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

Returns

Incredible0.6%

return rate — above 5% kills the launch gate

Avg price

Incredible$36.78

avg listing price — sweet spot $15–$100

Price range

Great$9.63–$62.14

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

Market size

Good$374K

$374K/yr · 63K searches

Growth

Okay+9.5%

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

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Review moat

Bad11,706

avg incumbent reviews — the moat a new listing must climb

Competition

Bad78%

top-5 click share — a locked-up shelf

Brand share

Bad94%

top-5 brand share — brand-locked demand

According to Flapen's Amazon United States niche tracking, ninjamas boys l/xl is a $374K/yr Amazon United States market (63K searches/yr). The top 5 brands hold 94% of demand. Demand peaks in Jan–Jun–Dec. Verdict: Worth a look — 51/100.

Data updated Jul 28, 2026 · scored weekly · How we score niches

ninjamas boys l/xl market data

Units sold / yr: 6K–8K; avg 1,000–1,250/product
Revenue / yr: $221K–$294K; units × avg price
Conversion rate: 16.1%
Avg BSR: #70
Page quality: 0%
Prime: 100%
Sponsored: 75%
Out of stock: 0.0%
Avg brand age: 41 months
Avg seller age: 134 days

Competition & brand share

The top 5 products capture 78% of clicks — a locked-up shelf that new listings rarely crack.

Brands

7 rising

Sellers

Top-5 brand share

94%

Top 20: 100%

Top-5 click share

78%

Top 20: 100%

Open market

Ninjamas44%
Pampers15%
FUVVRVAL15%
GoodNites10%
TIICHOO9%
US Angels3%
Open — no brand owns it (1 brand, 3%)

Demand & seasonality

Weekly Amazon search volume, last 87 weeks — +9.5% search growth over the last 90 days.

Peak months: Jan, Jun, Dec · busiest ÷ quietest = 6.2×

Open Trend

Top ninjamas boys l/xl search terms

ninjamas boys l/xl26K/yr +12.1%20.2% conv.
ninjamas boys lxl13K/yr +40.3%0.0% conv.
ninjamas boys xl14K/yr -15.4%3.5% conv.
ninjamas xl8K/yr +1.3%4.9% conv.
ninjamas large2K/yr -16.5%6.7% conv.

All search terms

Top ninjamas boys l/xl 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

Ninjamas Boys Bedwetting Nighttime Underwear Size L Pull Ups for Boys (64-95+ lbs) 68 Count Training Pants Overnight Underwear Kids Ultra Absorbent Hypoallergenic

Ninjamas$49.414.5★13,581 rev

Ninjamas Boys Bedwetting Nighttime Underwear Size L (64-95+ lbs) 34 Count Overnight Protection Ultra Absorbent Hypoallergenic

Pampers$26.694.5★13,581 rev

Boys Incontinence Underwear Leakproof Daily & Nighttime Bedwetting Briefs

FUVVRVAL$31.823.7★68 rev

TIICHOO Incontinence Underwear for Children Washable Absorbent Boys Nighttime Underwear 5 Pack (Medium Black/Gray/Blue/Neon Green/Orange)

TIICHOO$39.344.7★32 rev

Goodnites Boys Nighttime Bedwetting Underwear Size Extra Large (95-120 lbs) 63 Ct (3 Packs of 21) Packaging May Vary

GoodNites$59.404.8★28,362 rev

Newest

by launch date

TIICHOO Washable Incontinence Underwear for Boys Cotton Reusable Boxer Briefs 5 Pack (Medium Black/Gray/Blue/Orange/Neon Green)

TIICHOO$38.7597 rev

6mo ago

TIICHOO Incontinence Underwear for Children Washable Absorbent Boys Nighttime Underwear 5 Pack (Medium Black/Gray/Blue/Neon Green/Orange)

TIICHOO$39.3432 rev

9mo ago

Boys Incontinence Underwear Leakproof Daily & Nighttime Bedwetting Briefs

FUVVRVAL$31.8268 rev

10mo ago

Funnycokid Boys Pajamas Size 6 Summer Pjs Sets Sleepwear Loose Fit 2 Piece Ninja Gray Black Cool Soft Themed

Funnycokid$16.4058 rev

1y ago

US Angels Boys Pajama Pants - 3 Pack Boys Sleepwear Breathable and Soft PJ Pants Pajama Bottoms for Teens Youths and Kids - Size 7 8 10-12 14-16

US Angels$28.97807 rev

1y ago

What buyers say about ninjamas boys l/xl

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

What buyers love

Size-Overall19%

“Perfect fit”

Quality-Overall13%

“Great quality”

Comfort-Overall11%

“find them comfortable”

Leak-Proof8%

“no leaks”

Soft Feel4%

“Theyre soft enough for sleep”

Stress/Anxiety4%

“I suffer from stress incontinence and at 27 and male these are a live line for me I use them everyday for my medical issues”

Quick Drying3%

“Kept the bed dry so far”

Allergies3%

“I also like that theyre hypoallergenic”

Washability3%

“Saves us from having to wash bedding several times a week which is a huge win”

Absorbency3%

“Absorbency”

What buyers complain about

Leak-Proof29%

“Does not stop leaks”

Size-Overall12%

“I was having a hard time finding a size that would fit my son”

Value For Money6%

“Its expensive”

Allergies6%

“Dont you understand people are allergic or irritated from that crap”

Functionality-Overall4%

“Didn't work”

Durability4%

“they ripped apart when putting them on my son”

Hard Feel4%

“made quite rough”

Smell3%

“Heavy perfume”

Quality-Overall1%

“Over priced and zero quality”

Comfort-Overall1%

“My kid always complained about the comfort of other brands”

Top return reasons

Size-Overall72%

Leak-Proof6%

Advertised Vs Actual Product4%

Smell4%

Absorbency3%

Value For Money2%

Functionality-Overall2%

Age Suitability2%

Material Quality1%

Waist Fit1%

Common questions

Is ninjamas boys l/xl profitable to sell on Amazon United States?: The niche generates $374K/yr across 12 tracked products. 2 of 3 products launched in the last 360 days are still selling. 90-day search growth is +9.5%. Flapen's verdict: Worth a look (51/100).
How competitive is the ninjamas boys l/xl niche?: 7 brands and 21 sellers compete. The top 5 products take 78% of clicks and top 5 brands hold 94% of demand.
What do buyers complain about in ninjamas boys l/xl?: Top complaints mined from reviews: Leak-Proof, Size-Overall, Value For Money. The return rate is 0.6%.
When does demand for ninjamas boys l/xl peak?: Demand peaks in Jan–Jun–Dec; the busiest month runs 6.2× the quietest.
What does it cost to enter the ninjamas boys l/xl niche?: Listings span $9.63–$62.14; the average listing price is $36.78 (sweet spot $15–$100). The average incumbent carries 11,706 reviews — the moat a new listing must climb.