Is crown washing shower cap profitable to sell on Amazon United States?

The niche generates $26K/yr across 20 tracked products. 0 of 18 products launched in the last 360 days are still selling. 90-day search growth is -37.0%. Flapen's verdict: Skip it (37/100).

How competitive is the crown washing shower cap niche?

16 brands and 21 sellers compete. The top 5 products take 61% of clicks and top 5 brands hold 73% of demand.

What do buyers complain about in crown washing shower cap?

Top complaints mined from reviews: Size-Overall, Water Resistance, Durability. The return rate is 3.5%.

What does it cost to enter the crown washing shower cap niche?

Listings span $5.33–$25.48; the average listing price is $9.76 (sweet spot $15–$100). The average incumbent carries 865 reviews — the moat a new listing must climb.

crown washing shower cap

Skip it

Soft demand (-37.0% this quarter) — this niche doesn't clear our bar today.

Quality gap

Incredible2.5★

avg incumbent rating — lower means beatable quality

Review moat

Good864.65

avg incumbent reviews — the moat a new listing must climb

Brand share

Good73%

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

Price range

Good$5.33–$25.48

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

Returns

Okay3.5%

return rate — above 5% kills the launch gate

Competition

Okay61%

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

Avg price

Okay$9.76

avg listing price — sweet spot $15–$100

Conversion

Bad1.9%

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

Market size

Bad$26K

$26K/yr · 141K searches

Growth

Bad-37.0%

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

Signals Low Review Barrier Quality Gap Out of Stock

According to Flapen's Amazon United States niche tracking, crown washing shower cap is a $26K/yr Amazon United States market (141K searches/yr). The top 5 brands hold 73% of demand. Verdict: Skip it — 37/100.

Data updated Jul 15, 2026 · scored weekly · How we score niches

crown washing shower cap market data

Units sold / yr: 3K–4K; avg 100–250/product
Revenue / yr: $29K–$39K; units × avg price
Conversion rate: 1.9%
Avg BSR: #825
Page quality: 0%
Prime: 100%
Sponsored: 90%
Out of stock: 43.8%
Avg brand age: 38 months
Avg seller age: 126 days

Competition & brand share

The top 5 products take 61% of clicks — established leaders, but buyers still shop beyond them.

Brands

16 rising

Sellers

Top-5 brand share

73%

Top 20: 100%

Top-5 click share

61%

Top 20: 100%

Open market

23%

Generic32%
Huease15%
ICYSHIMER11%
specheer8%
MARRASSA7%
YGHZYHLYL4%

Demand

Weekly Amazon search volume, last 29 weeks — -37.0% search growth over the last 90 days.

Open Trend

Top crown washing shower cap search terms

crown washing shower cap62K/yr -35.7%2.0% conv.
crown wash40K/yr -31.6%2.0% conv.
rute wash shower cap7K/yr -55.2%0.2% conv.
crown washing cap5K/yr +4.1%1.6% conv.
crown wash shower cap11K/yr -56.5%1.7% conv.
crown washing shower cap extensions4K/yr -42.5%1.7% conv.
crown wash pony cap4K/yr -32.1%2.9% conv.
crown wash cap4K/yr -39.7%1.6% conv.
crown hair washing cap3K/yr -58.9%1.9% conv.

All search terms

Top crown washing shower cap 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★)3 products missing review or click data not plotted

All 20 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

(2PCS) Crown Washing Shower Cap Ponytail Waterproof Hair Sleeve Reusable Ponytail Bathing Hat A Quick Root Refresh Shower Hair Wash Accessory for Your Pony Tail

Generic$10.193.0★19 rev

Huease Crown Washing Shower Cap Ponytail Reusable Waterproof Hair Sleeve for Long Hair Adjustable Shower Cap for Styled Long Curly Locs Braids For Women Shower Gym Beach Travel Pool (Pink-1pc)

Huease$13.002.9★7 rev

Waterproof Hair Sleeve for Long Hair Crown Washing Shower Cap Ponytail Reusable Adjustable Quick Root Refresh for Shower Gym Travel Pool Beach Time Saver (Pink 2PC)

ICYSHIMER$9.980.0★0 rev

2PCS Crown Washing Shower Cap Waterproof Hair Sleeve for Long Hair Reusable & Adjustable Wash Cap for Quick Root Refresh Protect Styled Hair Locs Braids for Shower Gym Travel Beach(Black+Pink)

specheer$9.692.7★11 rev

Crown Washing Shower Cap Ponytail Waterproof Hair Sleeve for Long Hair Reusable Adjustable Shower Caps for Women Hair Wash Waterproof Ponytail Bathing Hat (3 Beige)

MARRASSA$19.993.5★11 rev

Newest

by launch date

Waterproof Hair Sleeve for Long Hair Crown Washing Shower Cap Ponytail Reusable Adjustable Quick Root Refresh for Shower Gym Travel Pool Beach Time Saver (Pink 2PC)

ICYSHIMER$9.980 rev

1mo ago

Waterproof Hair Sleeve for Long Hair Crown Washing Shower Cap Ponytail Reusable Adjustable Quick Root Refresh for Shower Gym Travel Pool Beach Time Saver (Purple+Pink 2PC)

ICYSHIMER$9.982 rev

2mo ago

Crown Washing Shower Cap Waterproof Crown Wash For Long Hair Crown Washing Shower Cap Ponytail Reusable Adjustable Quick Root Refresh For Shower Gym Travel Pool Beach Time Saver (Pink 2pc)

hdsgds$7.030 rev

2mo ago

Waterproof Hair Sleeve for Long Hair Crown Washing Shower Cap Ponytail Adjustable & Easy to Clean Reusable for Quick Root Refresh Protect Styled Hair for Shower Gym Travel Beach

Dekvoraq$5.330 rev

3mo ago

Gjinxi 2 PCS Waterproof Hair Sleeve for Long Hair Crown Washing Shower Ponytail Adjustable Reusable Quick Root Refresh Cap Protect Styled Bathing Hat for Women Shower Gym Travel Pool Beach

Gjinxi$5.911 rev

3mo ago

What buyers say about crown washing shower cap

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

What buyers love

Quality-Overall16%

“The cap, itself, is very well made, super affordable”

Comfort-Overall13%

“Comfortable easy to use”

Soft Feel13%

“Silky soft”

Adjustability/Rotatability/Reclining6%

“The adjustable option is great”

Size-Overall5%

“adjusts to the perfect size”

Suitability Curly Hair4%

“Great for curly hair”

Material Quality4%

“the material feels durable and reusable”

Hair Growth3%

“So far I have seen a noticeable difference in my hair”

Ease Of Use3%

“it's really easy to use”

Hair Styling3%

“My hair is very curly and very fine”

What buyers complain about

Size-Overall16%

“Too large”

Water Resistance13%

“Not waterproof”

Durability6%

“it doesnt last”

Moist/Dry5%

“It in fact DID NOT keep my extension dry”

Functionality-Overall5%

“doesn't work well for me”

Quality-Overall4%

“Disappointing experience and poor quality control”

Stretchability/Expandability/Elasticity4%

“the elastic gets loose after some time”

Comfort-Overall4%

“was uncomfortable”

Advertised Vs Actual Product4%

“Not as described”

Grip3%

“the cap just slips right down every time”

Top return reasons

Size-Overall33%

Comfort-Overall9%

Functionality-Overall9%

Advertised Vs Actual Product7%

Material Quality6%

Stretchability/Expandability/Elasticity3%