shower cap
Worth a lookShows a $6.6M/yr market, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size
Incredible$6.6M$6.6M/yr · 6.1M searches
Conversion
Incredible12.5%search→purchase rate — share of searches ending in a sale
Returns
Great1.1%return rate — above 5% kills the launch gate
Brand share
Good65%top-5 brand share — brands hold most of the demand
Competition
Good47%top-5 click share — leaders hold, buyers still browse
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Price range
Okay$3.66–$21.00cheapest to priciest tracked listing — scored on the share inside $15–$100
Review moat
Bad6,740.76avg incumbent reviews — the moat a new listing must climb
Avg price
Bad$8.62avg listing price — sweet spot $15–$100
Growth
Bad-11.9%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, shower cap is a $6.6M/yr Amazon United States market (6.1M searches/yr). The top 5 brands hold 65% of demand. Verdict: Worth a look — 61/100.
Data updated Jul 15, 2026 · scored weekly · How we score niches
shower cap market data
- Units sold / yr
- 600K–800K
- avg 15,000–20,000/product
- Revenue / yr
- $5.2M–$6.9M
- units × avg price
- Conversion rate
- 12.5%
- Avg BSR
- #17
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 100%
- Out of stock
- 1.1%
- Avg brand age
- 44 months
- Avg seller age
- 160 days
Competition & brand share
The top 5 products take 47% of clicks — established leaders, but buyers still shop beyond them.Brands
21 falling
Sellers
357
Top-5 brand share
65%
Top 20: 99%
Top-5 click share
47%
Top 20: 84%
Open market
29%
- Edoneery29%
- CHFONG17%
- YANIBEST9%
- Pengxiaomei6%
- Years calm6%
- Kitsch5%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -11.9% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.3×
Top shower cap search terms
- shower cap3.4M/yr
- shower caps for women reusable waterproof823K/yr
- shower caps580K/yr
- shower cap for women498K/yr
- large shower cap127K/yr
- shower cap for long hair73K/yr
- extra large shower cap53K/yr
- reusable shower caps55K/yr
- xl shower cap42K/yr
- waterproof shower cap42K/yr
Top 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.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
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
Shower Caps for Women 4 PCS Elastic and Reusable Bath Caps Double Waterproof Layers Shower Cap Bathing Shower Caps Environmental Protection Hair Bath Hat - Solid Color
CHFONG$6.564.6★7,335 rev
Reusable Shower Cap for Women Large Waterproof Shower Bonnet Washable Elastic Band Bath Hair Hat for Long Hair Braids(Green)
Edoneery$7.724.6★8,376 rev
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$12.404.7★503 rev
Shower Cap 3 Pcs Waterproof Reusable Shower Caps Bath Hair Hat for Women Men Kids
Pengxiaomei$4.234.3★20,828 rev
Newest
by launch dateYanibest 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
Shower Cap for Women Double Layer Waterproof Bath Cap Reusable Hair Protector Large Waterproof Shower Bonnet Washable Elastic Band Bath Hair Hat for Long Hair Braids - Pink
CHFONG$3.92340 rev
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
6 PCS Shower Caps for Women Double Side Waterproof Shower Cap PEVA Bath Caps for Shower Bathing Shower Caps - Candy Color
CHFONG$4.281,605 rev
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
Trending
90-day click momentumYanibest Satin Lined Shower Cap for Women Reusable Waterproof Frizz Free & Large Bath Cap with Soft Elastic Band Luxury Hair Protection Caps (Peachy Pink)
YANIBEST$12.404.7★
Yanibest Shower Cap for Women - Frizz Free Satin Lined Shower Cap Waterproof Large Double Layer Reusable with Soft Elastic Band for Braids Long Hair
YANIBEST$13.614.6★
Disposable Shower Caps 100 Pcs - Multi-Purpose Thickening Elastic Bath Cap Plastic Waterproof Clear Shower Caps Bath Shower Hair Caps Women Spa Home Use Hotel and Hair Salon Portable Travel(18.1)
AIDIQIU$7.724.6★
Shower Cap for Women Double Layer Waterproof Bath Cap Reusable Hair Protector Large Waterproof Shower Bonnet Washable Elastic Band Bath Hair Hat for Long Hair Braids - Pink
CHFONG$3.924.6★
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$6.464.6★
What buyers say about shower cap
What buyers praise and complain about, mined from review topics.What buyers love
“fit pretty comfortably”
“Its great for the price band quality”
“Excellent value”
“As described”
“Keeps my hair dry”
“comfortable to use”
“easy to clean”
“Beautiful and durable”
“Definitely waterproof”
“Good elastic”
What buyers complain about
“EXTREMELY SMALL”
“Cheap quality”
“Smells like fish”
“Elastic is Too Tight”
“does not allow water to seep in”
“No moisture gets through”
“Thin plastic”
“too big for my hair”
“it broke immediately”
“False advertisement”
Top return reasons
Common questions
- Is shower cap profitable to sell on Amazon United States?
- The niche generates $6.6M/yr across 34 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -11.9%. Flapen's verdict: Worth a look (61/100).
- How competitive is the shower cap niche?
- 21 brands and 357 sellers compete. The top 5 products take 47% of clicks and top 5 brands hold 65% of demand.
- What do buyers complain about in shower cap?
- Top complaints mined from reviews: Size-Overall, Quality-Overall, Smell. The return rate is 1.1%.
- When does demand for shower cap peak?
- Demand is steady year-round — the busiest month runs 1.3× the quietest.
- What does it cost to enter the shower cap niche?
- Listings span $3.66–$21.00; the average listing price is $8.62 (sweet spot $15–$100). The average incumbent carries 6,741 reviews — the moat a new listing must climb.