---
title: "Waterproof Mattress Protector Super King — £44K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/home-garden/waterproof-mattress-protector-super-king"
last_updated: "2026-07-31T17:34:44.237Z"
locale: en
meta:
description: "Niche score 43/100 · £44K/yr market · 35K searches/yr · £12.08 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 43/100 · £44K/yr market · 35K searches/yr · £12.08 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Waterproof Mattress Protector Super King — £44K/yr Amazon UK Niche (2026) - Flapen"
---
# **waterproof mattress protector super king**
**Skip it**
A small market ($44K/yr) — this niche doesn't clear our bar today.
Market size 11Growth 17Conversion 88Competition 43Returns 96Price range 58Avg price 51Brand share 35Review moat 17Quality gap 42
**Returns**
**Incredible****0.8%**
return rate — above 5% kills the launch gate
**Conversion**
**Great****10.3%**
search→purchase rate — share of searches ending in a sale
**Price range**
**Good****£6.80–£26.32**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Avg price**
**Good****£12.08**
avg listing price — sweet spot $15–$100
**Competition**
**Okay****59%**
top-5 click share — leaders hold, buyers still browse
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Brand share**
**Okay****84%**
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**
**Bad****18,399.32**
avg 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 ~~](https://flapen.com/research/methodology)
## **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.
1K600Holiday '24Spike '25Prime Day '25Black Friday '25Spike '26 seasonDecJanFebMarAprMayJunJulAugSepOctNovDecJanFebMarAprMayJun
No pronounced peak months · busiest ÷ quietest = 1.4×
[**Open Trend **](https://flapen.com/research/uk/home-garden/waterproof-mattress-protector-super-king/trend)
## **Top waterproof mattress protector super king search terms**
- **waterproof mattress protector super king**16K/yr-2.1%11.1% conv. - **super king waterproof mattress protector**9K/yr-14.9%14.9% conv. - **superking waterproof mattress protector extra deep**7K/yr-58.1%15.3% conv. - **super king mattress protectors waterproof**3K/yr+35.9%14.6% conv. [**All search terms **](https://flapen.com/research/uk/home-garden/waterproof-mattress-protector-super-king/search-terms)
## **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.
0%5%£2K10%£4K15%£7K20%£9K101001K10K100K1.0M Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 22 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**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**£10.02**4.5★27,694 rev](https://www.amazon.co.uk/dp/B07GNQ81CR) [2**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**£10.71**4.5★11,349 rev](https://www.amazon.co.uk/dp/B09TTRXLV2) [3**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**£8.98**4.6★57,290 rev](https://www.amazon.co.uk/dp/B07PGJNL7S) [4**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**£18.53**4.5★2,835 rev](https://www.amazon.co.uk/dp/B08W23MMLY) [5**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**£7.75**4.6★108,982 rev](https://www.amazon.co.uk/dp/B07ZD7WVZL)
**~~View all top sellers →~~**
### **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**£15.82**59 rev9mo ago](https://www.amazon.co.uk/dp/B0FYQ8Z1BK) [**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**£26.32**151 rev1y ago](https://www.amazon.co.uk/dp/B0F1DF8C4Q) [**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**£10.48**79,704 rev1y ago](https://www.amazon.co.uk/dp/B0DQY9KJY4) [**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**£7.53**2,182 rev1y ago](https://www.amazon.co.uk/dp/B0D1VWPLPD) [**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**£11.55**555 rev1y ago](https://www.amazon.co.uk/dp/B0DHD2XB96)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**LOOMERIG 100% Waterproof Mattress Protector Super King Size Extra Deep 40cm Fitted Skirt Breathable & Anti-Allergy Mattress Cover for Ultimate Comfort (White 182x200cm)**LOOMERIG**£15.82**4.8★**▲ 251%**](https://www.amazon.co.uk/dp/B0FYQ8Z1BK) [**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**£26.32**4.5★**▲ 186%**](https://www.amazon.co.uk/dp/B0F1DF8C4Q) [**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**£9.54**4.5★**▲ 175%**](https://www.amazon.co.uk/dp/B0BMPQBWPN) [**HOME STILL Super King Mattress Protector 180x200x30 cm 100% Waterproof Cotton Terry Breathable Top Waterproof Bottom Antibacterial Comfortable & Safe Sleep Machine Washable**HOME STILL**£15.54**4.6★**▲ 167%**](https://www.amazon.co.uk/dp/B09WW4WVPQ) [**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**£9.31**4.4★**▲ 161%**](https://www.amazon.co.uk/dp/B0B31D71XT)
**~~View all trending →~~**
## **What buyers say about waterproof mattress protector super king**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**24%
*“Quality protector”*
**Size-Overall**16%
*“Excellent fit”*
**Water Resistance**9%
*“Very water proof”*
**Value For Money**9%
*“Good value”*
**Advertised Vs Actual Product**7%
*“Just what I needed”*
**Comfort-Overall**5%
*“Comfortable”*
**Ease Of Cleaning**4%
*“easy to wash”*
**Noise Level**3%
*“It does not make any noise”*
**Washability**3%
*“Easy to wash”*
**Foam**2%
*“good mattress protector”*
### **What buyers complain about **
**Water Resistance**22%
*“being taken out to dry - making it pointless as cant possibly be waterproof when there are holes all within the plasticy layer”*
**Size-Overall**15%
*“Very hard to fit”*
**Quality-Overall**11%
*“Terrible product”*
**Thin**6%
*“Too thin”*
**Grip**4%
*“It constantly slipped on the mattress”*
**Noise Level**4%
*“Made a noise when moving around in bed”*
**Thickness**3%
*“Very thin and translucent”*
**Value For Money**3%
*“a waste of money”*
**Comfort-Overall**3%
*“He says it's not comfortable so I fitted another sheet on top”*
**Functionality-Overall**2%
*“Doesnt work”*
### **Top return reasons **
**Size-Overall**44%
**Material Quality**10%
**Quality-Overall**9%
**Noise Level**8%
**Water Resistance**6%
**Advertised Vs Actual Product**3%
**Thin**2%
**Thickness**2%
**Stain Resistance**1%
**Value For Money**1%
## **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.
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