swim cap
Launch itA $2.8M/yr market growing +77.1% this quarter with returns at 4.8% — clears our launch bar.
Market size
Incredible$2.8M$2.8M/yr · 3.4M searches
Growth
Great+77.1%90-day search growth — must beat 0% to launch
Quality gap
Great4.2★avg incumbent rating — lower means beatable quality
Conversion
Good6.6%search→purchase rate — share of searches ending in a sale
Competition
Good51%top-5 click share — leaders hold, buyers still browse
Avg price
Good$12.62avg listing price — sweet spot $15–$100
Price range
Okay$5.69–$24.08cheapest to priciest tracked listing — scored on the share inside $15–$100
Brand share
Okay85%top-5 brand share — brands hold most of the demand
Returns
Okay4.8%return rate — above 5% kills the launch gate
Review moat
Bad11,206.04avg incumbent reviews — the moat a new listing must climb
According to Flapen's Amazon United States niche tracking, swim cap is a $2.8M/yr Amazon United States market (3.4M searches/yr). The top 5 brands hold 85% of demand. Demand peaks in Jun–Jul–Aug. Verdict: Launch it — 63/100.
Data updated Jul 26, 2026 · scored weekly · How we score niches
swim cap market data
- Units sold / yr
- 200K–250K
- avg 8,000–10,000/product
- Revenue / yr
- $2.5M–$3.2M
- units × avg price
- Conversion rate
- 6.6%
- Avg BSR
- #20
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 100%
- Out of stock
- 0.0%
- Avg brand age
- 47 months
- Avg seller age
- 137 days
Competition & brand share
The top 5 products take 51% of clicks — established leaders, but buyers still shop beyond them.Brands
12 falling
Sellers
46
Top-5 brand share
85%
Top 20: 100%
Top-5 click share
51%
Top 20: 94%
Open market
12%
- Speedo57%
- TYR11%
- CoolMate9%
- BRDLOCK5%
- ARENA4%
- VIRSIDI3%
- Open — no brand owns it (6 brands, 12%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +77.1% search growth over the last 90 days.Peak months: Jun, Jul, Aug · busiest ÷ quietest = 2.9×
Top swim cap search terms
- swim cap1.1M/yr
- swim cap women adult507K/yr
- swimming cap328K/yr
- swim cap for long hair195K/yr
- swimming cap for women235K/yr
- swim cap for braids86K/yr
- swim caps for women135K/yr
- swim caps108K/yr
- swimming caps83K/yr
- swim cap for men102K/yr
Top swim 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
Speedo Unisex-Adult Swim Cap Silicone
Speedo$12.604.2★29,978 rev
TYR Adult Silicone Long Hair Swim Cap - Wrinkle-Free Streamlined Performance Cap for Braids Dreadlocks & Thick Hair Protection Black
TYR$13.894.3★6,011 rev
Speedo Unisex-Adult Swim Cap Silicone
Speedo$13.174.2★29,978 rev
Speedo Unisex-Adult Swim Cap Silicone Elastomeric
Speedo$13.764.2★8,460 rev
COOLMATE Fabric Swim Cap for Women Lap Swimming Light Purple M
CoolMate$9.704.0★1,111 rev
Newest
by launch date
COOLMATE Large Fabric Swim Cap for Long Hair Women Light Purple M 1 Pack
CoolMate$10.2685 rev
COOLMATE Fabric Swim Cap for Women Lap Swimming Light Purple M
CoolMate$9.701,111 rev
COOLMATE Fabric Swim Cap for Women Lap Swimming Lightweight Black M
CoolMate$9.401,111 rev
2 Pack Swim Cap for Women Men Adult Silicone Swimming Caps for Short Long Hair Waterproof Swim Hats Bathing Caps to Keep Hair Dry with Nose Clip and Earplugs (Black&Rose)
VIRSIDI$13.93534 rev
2 Pack Large Swim Caps for Long Hair Silicone Swimming Cap for Adult Women Men Waterproof Swim Hats Bathing Caps to Keep Hair Dry with Bonus Nose Clip and Earplugs-01
VIRSIDI$14.34513 rev
Trending
90-day click momentum
Vorshape Swim Cap Kids (2 Pack) Durable Waterproof Swimming Cap for Girls Boys Teens Toddler Aged 8-15 Comfortable Fit Kid Swim Cap for Long Hair Silicone Swim Caps for Kids Bright Purple & Pink
Vorshape$9.774.2★
BRDLOCK Extra Large Swim Cap for Braids and Dreadlocks Swimming Cap for Women Long Hair Braids Dreads Locs Thick Curly Hair Waterproof Silicone Swim Caps Keep Your Hair Dry
BRDLOCK$10.594.3★
COOLMATE Fabric Swim Cap for Women Lap Swimming Lightweight Black M
CoolMate$9.404.0★
TYR Adult Silicone Long Hair Swim Cap - Wrinkle-Free Streamlined Performance Cap for Braids Dreadlocks & Thick Hair Protection Black
TYR$13.894.3★
SOUL CAP - Large Swimming Cap for Long Hair - Designed for Long Hair Dreadlocks Weaves Hair Extensions Braids Curls & Afros - Women & Men - Silicone (Black XL)
SOUL CAP$19.814.2★
What buyers say about swim cap
What buyers praise and complain about, mined from review topics.What buyers love
“which fits a big head pretty good”
“Great quality and comfortable fit”
“Hair stays dry”
“Good price”
“So comfortable”
“Easy to use”
“The material is durable”
“Works as advertised”
“does the job”
“The material feels durable”
What buyers complain about
“not one size fits all”
“broke in two months”
“It doesn't keep your hair completely dry”
“its wet”
“Low quality, ripped after 1 month”
“Hard to put on”
“Leaks through”
“Slips off”
“The stretchiness was lacking”
“Too thick”
Top return reasons
Common questions
- Is swim cap profitable to sell on Amazon United States?
- The niche generates $2.8M/yr across 24 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +77.1%. Flapen's verdict: Launch it (63/100).
- How competitive is the swim cap niche?
- 12 brands and 46 sellers compete. The top 5 products take 51% of clicks and top 5 brands hold 85% of demand.
- What do buyers complain about in swim cap?
- Top complaints mined from reviews: Size-Overall, Durability, Moist/Dry. The return rate is 4.8%.
- When does demand for swim cap peak?
- Demand peaks in Jun–Jul–Aug; the busiest month runs 2.9× the quietest.
- What does it cost to enter the swim cap niche?
- Listings span $5.69–$24.08; the average listing price is $12.62 (sweet spot $15–$100). The average incumbent carries 11,206 reviews — the moat a new listing must climb.