Is large shower cap profitable to sell on Amazon United States?

The niche generates $463K/yr across 28 tracked products. 2 of 4 products launched in the last 360 days are still selling. 90-day search growth is -0.1%. Flapen's verdict: Worth a look (53/100).

How competitive is the large shower cap niche?

15 brands and 345 sellers compete. The top 5 products take 52% of clicks and top 5 brands hold 67% of demand.

What do buyers complain about in large shower cap?

Top complaints mined from reviews: Size-Overall, Smell, Water Resistance. The return rate is 1.4%.

When does demand for large shower cap peak?

Demand is steady year-round — the busiest month runs 1.2× the quietest.

What does it cost to enter the large shower cap niche?

Listings span $5.01–$24.99; the average listing price is $10.08 (sweet spot $15–$100). The average incumbent carries 3,264 reviews — the moat a new listing must climb.

large shower cap

Worth a look

Shows low returns (1.4%), but soft demand (-0.1% this quarter) keeps it on the watch list.

Returns

Great1.4%

return rate — above 5% kills the launch gate

Conversion

Great8.6%

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

Brand share

Good67%

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

Market size

Good$463K

$463K/yr · 534K searches

Competition

Good52%

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

Price range

Good$5.01–$24.99

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

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Avg price

Okay$10.08

avg listing price — sweet spot $15–$100

Review moat

Okay3,264.04

avg incumbent reviews — the moat a new listing must climb

Growth

Bad-0.1%

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

According to Flapen's Amazon United States niche tracking, large shower cap is a $463K/yr Amazon United States market (534K searches/yr). The top 5 brands hold 67% of demand. Verdict: Worth a look — 53/100.

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

large shower cap market data

Units sold / yr: 40K–50K; avg 1,500–2,000/product
Revenue / yr: $403K–$504K; units × avg price
Conversion rate: 8.6%
Avg BSR: #61
Page quality: 0%
Prime: 100%
Sponsored: 100%
Out of stock: 0.0%
Avg brand age: 44 months
Avg seller age: 162 days

Competition & brand share

The top 5 products take 52% of clicks — established leaders, but buyers still shop beyond them.

Brands

15 falling

Sellers

345

Top-5 brand share

67%

Top 20: 100%

Top-5 click share

52%

Top 20: 91%

Open market

26%

CHFONG25%
Auban14%
Edoneery14%
Aquior8%
mikimini7%
WSICSE6%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -0.1% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.2×

Open Trend

Top large shower cap search terms

large shower cap127K/yr -4.9%7.3% conv.
shower cap for long hair73K/yr +4.3%5.1% conv.
extra large shower cap53K/yr +6.5%6.5% conv.
xl shower cap42K/yr +9.3%6.0% conv.
large shower cap for women33K/yr +24.8%7.4% conv.
shower cap large33K/yr -6.7%7.1% conv.
jumbo shower cap25K/yr +15.0%7.6% conv.
big shower cap22K/yr -2.6%7.6% conv.
extra large shower cap for women27K/yr -18.3%6.8% conv.
oversized shower cap12K/yr +2.7%6.4% conv.

All search terms

Top large 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★)

All 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Super Jumbo Shower Cap 2 PCS Waterproof Shower Caps for Women Extra Large Shower Cap Reusable Super Large Bath Caps Hair Cap for Long Thick Curly Hair Locs Twist Braids - Black + White

CHFONG$5.014.4★2,480 rev

Auban Extra Large Shower Cap Double-Layer Waterproof Reusable XL Satin Lining Shower Bonnet for Women Thick Long Hair Locs Braids(Black)

Auban$9.714.6★2,795 rev

Reusable Shower Cap for Women Large Waterproof Shower Bonnet Washable Elastic Band Bath Hair Hat for Long Hair Braids(Pink)

Edoneery$7.744.6★8,376 rev

Aquior Shower Cap Extra Adjustable Shower Caps for Women Double-Layer Waterproof Reusable Hair Cap Large Size Hair Cap for All Hair for Girls Spa Bath Soft and Comfortable (Purple)

Aquior$9.624.4★1,519 rev

WSICSE 2 Packs Large Shower Caps for Women Waterproof Shower Cap Double Layers Bath Caps with Hair Scrunchies for Long Thick Hair

WSICSE$5.894.6★2,215 rev

Newest

by launch date

Yanibest Satin Lined Shower Cap for Women Reusable Waterproof Frizz Free & Large Bath Cap with Soft Elastic Band Luxury Hair Protection Caps (Peachy Pink)

YANIBEST$12.40503 rev

8mo ago

Years Calm Extra Large Shower Cap for Long Thick Hair Waterproof Double Layer Bath Cap with Satin Lining Secure Elastic Fit for Braids Curls & Extensions

Years calm$9.77109 rev

10mo ago

mikimini Large Shower Cap for Women Reusable Waterproof Extra Large Hair Cap with Adjustable Elastic Band and Vibrant Floral Print XL Bath Cap for Long Hair & Short Hair

mikimini$10.02101 rev

11mo ago

Kitsch Luxury Shower Caps for Women Reusable Waterproof - Large Shower Cap for Women Non-slip Quick-dry Hair Cap for Long and Short Hair Comfortable and Stylish Design - Cherry Print

Kitsch$21.0014,593 rev

1y ago

Years calm Shower Caps for Women Reusable Waterproof Double Layer Waterproof Fabric - Both Sides Usable Reversible Pattern & Solid Color Design Soft Elastic Keeps Hair Dry for shower Spa Travel

Years calm$6.462,502 rev

1y ago

What buyers say about large shower cap

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

What buyers love

Size-Overall20%

“Fits snuggly”

Quality-Overall16%

“Amazing quality”

Advertised Vs Actual Product8%

“Just What I Needed”

Moist/Dry7%

“Keeps my hair dry”

Value For Money5%

“Excellent value”

Comfort-Overall5%

“comfortable to use”

Ease Of Use4%

“Easy to put on”

Stretchability/Expandability/Elasticity3%

“Good elastic”

Water Resistance3%

“Its very water proof”

Durability3%

“The material feels durable”

What buyers complain about

Size-Overall31%

“Not a good fit”

Smell6%

“Smells like fish”

Water Resistance5%

“Water is not able to get through”

Moist/Dry5%

“No moisture gets through”

Suitability Long Hair4%

“This is NOT for people with long hair”

Stretchability/Expandability/Elasticity4%

“It didnt have a lot of stretch”

Quality-Overall4%

“Absolute garbage”

Durability2%

“Broke after a few uses”

Thickness2%

“Thick”

Advertised Vs Actual Product2%

“Inaccurate product photos”

Top return reasons

Size-Overall50%

Advertised Vs Actual Product6%

Smell5%

Material Quality4%

Color3%

Stretchability/Expandability/Elasticity3%

Functionality-Overall3%

Quality-Overall3%

Water Resistance2%

Value For Money2%

Common questions

Is large shower cap profitable to sell on Amazon United States?: The niche generates $463K/yr across 28 tracked products. 2 of 4 products launched in the last 360 days are still selling. 90-day search growth is -0.1%. Flapen's verdict: Worth a look (53/100).
How competitive is the large shower cap niche?: 15 brands and 345 sellers compete. The top 5 products take 52% of clicks and top 5 brands hold 67% of demand.
What do buyers complain about in large shower cap?: Top complaints mined from reviews: Size-Overall, Smell, Water Resistance. The return rate is 1.4%.
When does demand for large shower cap peak?: Demand is steady year-round — the busiest month runs 1.2× the quietest.
What does it cost to enter the large shower cap niche?: Listings span $5.01–$24.99; the average listing price is $10.08 (sweet spot $15–$100). The average incumbent carries 3,264 reviews — the moat a new listing must climb.