king size plastic mattress protector
Skip itA deep review moat (27,893 avg reviews) — this niche doesn't clear our bar today.
Conversion
Great9.9%search→purchase rate — share of searches ending in a sale
Avg price
Great$17.91avg listing price — sweet spot $15–$100
Returns
Great2.0%return rate — above 5% kills the launch gate
Quality gap
Good4.3★avg incumbent rating — lower means beatable quality
Price range
Good$7.65–$27.46cheapest to priciest tracked listing — scored on the share inside $15–$100
Brand share
Okay76%top-5 brand share — brands hold most of the demand
Growth
Okay+4.8%90-day search growth — must beat 0% to launch
Market size
Bad$93K$93K/yr · 53K searches
Competition
Bad76%top-5 click share — a locked-up shelf
Review moat
Bad27,892.55avg incumbent reviews — the moat a new listing must climb
According to Flapen's Amazon United States niche tracking, king size plastic mattress protector is a $93K/yr Amazon United States market (53K searches/yr). The top 5 brands hold 76% of demand. Verdict: Skip it — 47/100.
Data updated Jul 29, 2026 · scored weekly · How we score niches
king size plastic mattress protector market data
- Units sold / yr
- 5K–6K
- avg 250–500/product
- Revenue / yr
- $90K–$107K
- units × avg price
- Conversion rate
- 9.9%
- Avg BSR
- #34
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 91%
- Out of stock
- 0.0%
- Avg brand age
- 65 months
- Avg seller age
- 191 days
Competition & brand share
The top 5 products capture 76% of clicks — a locked-up shelf that new listings rarely crack.Brands
11 falling
Sellers
13
Top-5 brand share
76%
Top 20: 100%
Top-5 click share
76%
Top 20: 100%
Open market
18%
- Axgatoxe30%
- BLISSFORD16%
- Amazon Basics13%
- FRESH IDEAS8%
- SOFINNI8%
- Ruili6%
- Open — no brand owns it (5 brands, 18%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +4.8% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.4×
Top king size plastic mattress protector search terms
- king size plastic mattress protector13K/yr
- plastic bed cover king9K/yr
- plastic king size mattress protector5K/yr
- king size plastic mattress cover7K/yr
- plastic mattress protector king5K/yr
- plastic mattress cover king size bed5K/yr
- king plastic mattress cover4K/yr
- king size mattress plastic cover3K/yr
- king mattress plastic cover3K/yr
Top king size plastic mattress protector 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 11 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Plastic Mattress Bag for Moving Storage King Size (1.5MIL)
Axgatoxe$8.284.3★1,532 rev
BLISSFORD Plastic Mattress Protector - Heavy Duty Fitted Vinyl - Plastic Mattress Cover King Size Bed Rubber Sheets for Bedwetting Adult or Child 100% Waterproof Sheets King Size
BLISSFORD$23.704.4★4,599 rev
Amazon Basics Waterproof Mattress Protector Bed Bug and Dust Mite Barrier King White
Amazon Basics$15.334.5★1,147 rev
Fresh Ideas Fitted Vinyl Mattress Protector Waterproof Hypoallergenic 14 Pockets King
FRESH IDEAS$12.714.1★2,421 rev
Waterproof Zippered Plastic Mattress Protector Encasement (King Size)
SOFINNI$18.913.4★4,212 rev
Newest
by launch dateAmazon Basics Waterproof Mattress Protector Bed Bug and Dust Mite Barrier King White
Amazon Basics$15.331,147 rev
Plastic Mattress Bag for Moving Storage King Size (1.5MIL)
Axgatoxe$8.281,532 rev
Plastic Mattress Bag for Moving Storage Mattress Protector Cover Mattress Bag for Disposal (King)
SANEMBER$7.65513 rev
Waterproof Mattress Protector King Size Mattress Cover Protector Smooth Top Mattress Protector for Kids Breathable Skin Friendly and Noiseless Fitted Sheet King Size Polyester
Moonsea$13.967,849 rev
BEDLORE Waterproof Mattress Protector King Size Mattress Pad with Deep Pocket 6-18 Depth Soft Noiseless Dirt-Proof Bed Mattress Cover Washable for Home Bedroom Hotel (Gray)
BEDLORE$27.4623,362 rev
Trending
90-day click momentum
King Size Mattress Protector Waterproof- Washable Mattress Cover Fitted Bed Pad Noiseless Plastic Protection Up to 18 Mattress Protector Soft&BreathableWhite
Ruili$24.684.6★
Amazon Basics Waterproof Mattress Protector Bed Bug and Dust Mite Barrier King White
Amazon Basics$15.334.5★
Plastic Mattress Bag for Moving Storage Mattress Protector Cover Mattress Bag for Disposal (King)
SANEMBER$7.654.4★
Fresh Ideas Fitted Vinyl Mattress Protector Waterproof Hypoallergenic 14 Pockets King
FRESH IDEAS$12.714.1★
BLISSFORD Plastic Mattress Protector - Heavy Duty Fitted Vinyl - Plastic Mattress Cover King Size Bed Rubber Sheets for Bedwetting Adult or Child 100% Waterproof Sheets King Size
BLISSFORD$23.704.4★
What buyers say about king size plastic mattress protector
What buyers praise and complain about, mined from review topics.What buyers love
“Easy fit”
“A+ Quality”
“Great value”
“Water proof”
“Very comfortable”
“So Soft”
“Super thick”
“Easy to use”
“As advertised”
“Easy to wash”
What buyers complain about
“Not a water proof mattress”
“what I did receive seems low quality”
“maybe not as durable as the more expensive ones”
“too big”
“Its less thick than my ziplock sandwich bags”
“Leaked through”
“Makes noise”
“And it would cost you less”
“Not as described”
“Did not work”
Top return reasons
Common questions
- Is king size plastic mattress protector profitable to sell on Amazon United States?
- The niche generates $93K/yr across 11 tracked products. 90-day search growth is +4.8%. Flapen's verdict: Skip it (47/100).
- How competitive is the king size plastic mattress protector niche?
- 11 brands and 13 sellers compete. The top 5 products take 76% of clicks and top 5 brands hold 76% of demand.
- What do buyers complain about in king size plastic mattress protector?
- Top complaints mined from reviews: Water Resistance, Quality-Overall, Durability. The return rate is 2.0%.
- When does demand for king size plastic mattress protector peak?
- Demand is steady year-round — the busiest month runs 1.4× the quietest.
- What does it cost to enter the king size plastic mattress protector niche?
- Listings span $7.65–$27.46; the average listing price is $17.91 (sweet spot $15–$100). The average incumbent carries 27,893 reviews — the moat a new listing must climb.