waterproof mattress protector super king
Skip itA small market ($44K/yr) — this niche doesn't clear our bar today.
Returns
Incredible0.8%return rate — above 5% kills the launch gate
Conversion
Great10.3%search→purchase rate — share of searches ending in a sale
Price range
Good£6.80–£26.32cheapest to priciest tracked listing — scored on the share inside $15–$100
Avg price
Good£12.08avg listing price — sweet spot $15–$100
Competition
Okay59%top-5 click share — leaders hold, buyers still browse
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Brand share
Okay84%top-5 brand share — brands hold most of the demand
Growth
Bad-15.7%90-day search growth — must beat 0% to launch
Review moat
Bad18,399.32avg incumbent reviews — the moat a new listing must climb
Market size
Bad£44K£44K/yr · 35K searches
According to Flapen's Amazon United Kingdom niche tracking, waterproof mattress protector super king is a £44K/yr Amazon United Kingdom market (35K searches/yr). The top 5 brands hold 84% of demand. Verdict: Skip it — 43/100.
Data updated Jul 28, 2026 · scored weekly · How we score niches
waterproof mattress protector super king market data
- Units sold / yr
- 5K–6K
- avg 100–250/product
- Revenue / yr
- £60K–£72K
- units × avg price
- Conversion rate
- 10.3%
- Avg BSR
- #39
- Page quality
- 0%
- Prime
- 55%
- Sponsored
- 100%
- Out of stock
- 10.8%
- Avg brand age
- 43 months
- Avg seller age
- 203 days
Competition & brand share
The top 5 products take 59% of clicks — established leaders, but buyers still shop beyond them.Brands
12 rising
Sellers
17
Top-5 brand share
84%
Top 20: 100%
Top-5 click share
59%
Top 20: 98%
Open market
12%
- Utopia Bedding32%
- CAROLINE SHATUIK20%
- IMFAA19%
- ZNR7%
- Oliver Bedding6%
- CORIWELL4%
- Open — no brand owns it (6 brands, 12%)
Demand & seasonality
Weekly Amazon search volume, last 89 weeks — -15.7% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.4×
Top waterproof mattress protector super king search terms
- waterproof mattress protector super king16K/yr
- super king waterproof mattress protector9K/yr
- superking waterproof mattress protector extra deep7K/yr
- super king mattress protectors waterproof3K/yr
Top waterproof mattress protector super king 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 22 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
IMFAA 100% Waterproof Mattress Protector-Extra Deep 40 Cm Stretch SkirtSuper King(182x200) Cm Terry Towel Mattress TopperAnti Allergy and Breathable Fitted Mattress Cover. (Super King(182x200+40)Cm)
IMFAA£10.024.5★27,694 rev
Caroline Shatuik100% Waterproof Mattress Protector Super King-40cm Extra Deep Fitted Terry Towel Mattress Topper Non Noisy Ani Allergy Mattress Cover Super king(182 x 200+40cm)
CAROLINE SHATUIK£10.714.5★11,349 rev
Utopia Bedding Waterproof Mattress Protector Super King Bed Size 180 x 200 x 30 cm Premium Mattress Cover OEKO-Tex Certified Breathable and Machine Washable
Utopia Bedding£8.984.6★57,290 rev
ZNR Quilted Waterproof Mattress Protectors Super King Size | 40 CM Extra Deep Skirt | Fitted Sheet Style Bed Cover | Hypoallergenic | Dust Mite Proof | Breathable | Noiseless (Super King)
ZNR£18.534.5★2,835 rev
Waterproof Mattress Protector Super King 180 x 200 cm Fits Up to 40 cm Deep Mattresses Premium Terry Mattress Protector All Around Elastic Super King Mattress Cover by Utopia Bedding
Utopia Bedding£7.754.6★108,982 rev
Newest
by launch date
LOOMERIG 100% Waterproof Mattress Protector Super King Size Extra Deep 40cm Fitted Skirt Breathable & Anti-Allergy Mattress Cover for Ultimate Comfort (White 182x200cm)
LOOMERIG£15.8259 rev
GRT Bamboo Waterproof Mattress Protector Super King - 3D Air Fiber Cooling Mattress Cover Breathable Ultra Soft Noiseless Mattress Protector with 40cm Extra Deep Skirt (Super King - 182 x 200cm)
GRT£26.32151 rev
Utopia Bedding Waterproof Mattress Encasement Super King Size (180 x 200 x 30 cm) Zippered Mattress Protector Cover Bed Bug & Dust Mite Proof White
Utopia Bedding£10.4879,704 rev
Utopia Bedding Waterproof Mattress Protector Super King (180 x 200 x 30 cm) Soft & Breathable 3D Air Fabric Premium Noiseless Bed Mattress Cover Fitted Sheet Style Fits Up to 30 cm Deep
Utopia Bedding£7.532,182 rev
Oliver Bedding Quilted Super King Mattress Protector(182 x 200 cm) Waterproof Mattress Protector Super King Bed Fits Mattresses up to 30cm Deep Breathable Bed Mattresses Cover - White
Oliver Bedding£11.55555 rev
Trending
90-day click momentumLOOMERIG 100% Waterproof Mattress Protector Super King Size Extra Deep 40cm Fitted Skirt Breathable & Anti-Allergy Mattress Cover for Ultimate Comfort (White 182x200cm)
LOOMERIG£15.824.8★
GRT Bamboo Waterproof Mattress Protector Super King - 3D Air Fiber Cooling Mattress Cover Breathable Ultra Soft Noiseless Mattress Protector with 40cm Extra Deep Skirt (Super King - 182 x 200cm)
GRT£26.324.5★
Utopia Bedding Waterproof Mattress Protector (Superking Bed 180 x 200 x 38 cm) Soft Breathable Quilted Pad Noiseless Fitted Mattress Cover with Deep Pockets White
Utopia Bedding£9.544.5★
HOME STILL Super King Mattress Protector 180x200x30 cm 100% Waterproof Cotton Terry Breathable Top Waterproof Bottom Antibacterial Comfortable & Safe Sleep Machine Washable
HOME STILL£15.544.6★
ENGLISH HOME 2 Pack Waterproof Mattress Protector Breathable Microfiber Mattress Cover Sheet with Elastic Straps 30 cm Deep Washable Bed Cover Mattress Topper Pad 180x200 cm White Super King
English Home£9.314.4★
What buyers say about waterproof mattress protector super king
What buyers praise and complain about, mined from review topics.What buyers love
“Quality protector”
“Excellent fit”
“Very water proof”
“Good value”
“Just what I needed”
“Comfortable”
“easy to wash”
“It does not make any noise”
“Easy to wash”
“good mattress protector”
What buyers complain about
“being taken out to dry - making it pointless as cant possibly be waterproof when there are holes all within the plasticy layer”
“Very hard to fit”
“Terrible product”
“Too thin”
“It constantly slipped on the mattress”
“Made a noise when moving around in bed”
“Very thin and translucent”
“a waste of money”
“He says it's not comfortable so I fitted another sheet on top”
“Doesnt work”
Top return reasons
Common questions
- Is waterproof mattress protector super king profitable to sell on Amazon United Kingdom?
- The niche generates £44K/yr across 22 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -15.7%. Flapen's verdict: Skip it (43/100).
- How competitive is the waterproof mattress protector super king niche?
- 12 brands and 17 sellers compete. The top 5 products take 59% of clicks and top 5 brands hold 84% of demand.
- What do buyers complain about in waterproof mattress protector super king?
- Top complaints mined from reviews: Water Resistance, Size-Overall, Quality-Overall. The return rate is 0.8%.
- When does demand for waterproof mattress protector super king peak?
- Demand is steady year-round — the busiest month runs 1.4× the quietest.
- What does it cost to enter the waterproof mattress protector super king niche?
- Listings span £6.80–£26.32; the average listing price is £12.08 (sweet spot $15–$100). The average incumbent carries 18,399 reviews — the moat a new listing must climb.