---
title: "Split Top King Mattress Protector — $63K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/home-kitchen/split-top-king-mattress-protector"
last_updated: "2026-08-09T21:01:59.206Z"
locale: en
meta:
description: "Niche score 39/100 · $63K/yr market · 22K searches/yr · $46.98 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 39/100 · $63K/yr market · 22K searches/yr · $46.98 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Split Top King Mattress Protector — $63K/yr Amazon US Niche (2026) - Flapen"
---
# **split top king mattress protector**
**Skip it**
Brand-locked demand (top 5 brands take 96% of clicks) — this niche doesn't clear our bar today.
Market size 16Growth 22Conversion 67Competition 23Returns 85Price range 95Avg price 94Brand share 11Review moat 22Quality gap 27
**Price range**
**Incredible****$27.46–$71.17**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Avg price**
**Great****$46.98**
avg listing price — sweet spot $15–$100
**Returns**
**Great****1.5%**
return rate — above 5% kills the launch gate
**Conversion**
**Good****6.1%**
search→purchase rate — share of searches ending in a sale
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Competition**
**Bad****73%**
top-5 click share — a locked-up shelf
**Growth**
**Bad****-6.2%**
90-day search growth — must beat 0% to launch
**Review moat**
**Bad****9,827.33**
avg incumbent reviews — the moat a new listing must climb
**Market size**
**Bad****$63K**
$63K/yr · 22K searches
**Brand share**
**Bad****96%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, split top king mattress protector is a $63K/yr Amazon United States market (22K searches/yr). The top 5 brands hold 96% of demand. Verdict: Skip it — 39/100.
Data updated Jul 29, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **split top king mattress protector market data**
- **Units sold / yr**
- **1K–2K**
- avg 0–100/product
- **Revenue / yr**
- **$59K–$70K**
- units × avg price
- **Conversion rate**
- **6.1%**
- **Avg BSR**
- **#86**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **100%**
- **Out of stock**
- **6.3%**
- **Avg brand age**
- **60 months**
- **Avg seller age**
- **184 days**
## **Competition & brand share**
The top 5 products capture 73% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**7 **▼falling
**Sellers**
**9**
**Top-5 brand share**
**96%**
Top 20: 100%
**Top-5 click share**
**73%**
Top 20: 100%
**Open market**
**2%**
- Kingnex63% - Moonsea11% - SPRINGSPIRIT11% - BEDLORE6% - KUTUU5% - Coldwind2% - Open — no brand owns it (1 brand, 2%)
## **Demand**
Weekly Amazon search volume, last 26 weeks — -6.2% search growth over the last 90 days.
500300Spike '26Feb '26Mar '26Mar '26Apr '26May '26Jun '26Jul '26
[**Open Trend **](https://flapen.com/research/us/home-kitchen/split-top-king-mattress-protector/trend)
## **Top split top king mattress protector search terms**
- **split top king mattress protector**10K/yr-4.1%7.4% conv. - **split head king mattress protector**5K/yr-20.2%6.2% conv. - **sleep number mattress pad**4K/yr+3.8%2.1% conv. - **mattress covers sleep number**3K/yr+1.5%0.9% conv. [**All search terms **](https://flapen.com/research/us/home-kitchen/split-top-king-mattress-protector/search-terms)
## **Top split top king 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.
0%10%$6K20%$13K30%$19K40%$25K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 12 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Kingnex Waterproof Split Top King Mattress Protector Pad for Adjustable Bed**Kingnex**$58.26**4.6★1,556 rev](https://www.amazon.com/dp/B099ZM7QVJ) [2**Kingnex Waterproof Split Top King Mattress Protector for Adjustable Bed**Kingnex**$41.30**4.6★7,028 rev](https://www.amazon.com/dp/B096DH4S1T) [3**Bamboo Viscose Cooling Split Top King Mattress Protector for Adjustable Bed with Upper Flex Waterproof Fitted Sheet Style Matress Cover 32-34 Split from Head**Kingnex**$58.68**4.5★720 rev](https://www.amazon.com/dp/B09MF2PMBF) [4**Split Top King Mattress Protector Pad Waterproof Cover for Adjustable Bed**SPRINGSPIRIT**$57.42**4.6★18,038 rev](https://www.amazon.com/dp/B0D7PVP6FP) [5**Split Head King Size Mattress Protector Waterproof for Adjustable Bed 34 Top Split from Head Smooth Top Breathable Skin Friendly and Noiseless Fitted Sheet Viscose Terry Mattress Cover**Moonsea**$28.08**4.4★1,021 rev](https://www.amazon.com/dp/B0CQ7JTQTL)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**KUTUU Split King Mattress Protector for Adjustable Bed Cooling and Breathable Bamboo Viscose Waterproof Split Top King Mattress Pad Cover with 6-18 inches Deep Pocket 32-34 inches Split from Head**KUTUU**$71.17**33 rev7mo ago](https://www.amazon.com/dp/B0G6YSTRB3) [**Split Top King Mattress Protector 34 Top Split from Head 7880**SPRINGSPIRIT**$28.30**17,914 rev9mo ago](https://www.amazon.com/dp/B0FX9538T9) [**Split Top King Mattress Pad Waterproof Protector White (Cover Only)**Coldwind**$57.86**1,615 rev1y ago](https://www.amazon.com/dp/B0DKFVLV46) [**Split Top King Mattress Protector Pad Waterproof Cover for Adjustable Bed**SPRINGSPIRIT**$57.42**18,038 rev2y ago](https://www.amazon.com/dp/B0D7PVP6FP) [**Split Head King Size Mattress Protector Waterproof for Adjustable Bed 34 Top Split from Head Smooth Top Breathable Skin Friendly and Noiseless Fitted Sheet Viscose Terry Mattress Cover**Moonsea**$28.08**1,021 rev2y ago](https://www.amazon.com/dp/B0CQ7JTQTL)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**KUTUU Split King Mattress Protector for Adjustable Bed Cooling and Breathable Bamboo Viscose Waterproof Split Top King Mattress Pad Cover with 6-18 inches Deep Pocket 32-34 inches Split from Head**KUTUU**$71.17**4.8★**▲ 173%**](https://www.amazon.com/dp/B0G6YSTRB3) [**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**$27.46**4.6★**▲ 35%**](https://www.amazon.com/dp/B0C1NQZDYH) [**Bamboo Viscose Cooling Split Top King Mattress Protector for Adjustable Bed with Upper Flex Waterproof Fitted Sheet Style Matress Cover 32-34 Split from Head**Kingnex**$58.68**4.5★**▲ 30%**](https://www.amazon.com/dp/B09MF2PMBF) [**Kingnex Waterproof Split Top King Mattress Protector for Adjustable Bed**Kingnex**$39.06**4.6★**▲ 15%**](https://www.amazon.com/dp/B096DK3MCF) [**Kingnex Waterproof Split Top King Mattress Protector Pad for Adjustable Bed**Kingnex**$58.26**4.6★**— 5%**](https://www.amazon.com/dp/B099ZM7QVJ)
**~~View all trending →~~**
## **What buyers say about split top king mattress protector**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**17%
*“Decent quality”*
**Size-Overall**17%
*“fit snug”*
**Comfort-Overall**10%
*“Its comfortable and it breathes well”*
**Soft Feel**9%
*“Is soft”*
**Value For Money**7%
*“Great Buy”*
**Water Resistance**5%
*“Water proof”*
**Advertised Vs Actual Product**4%
*“As described”*
**Foam**3%
*“Nice mattress pad”*
**Washability**2%
*“theyre easy to wash”*
**Noise Level**2%
*“it is quiet”*
### **What buyers complain about **
**Water Resistance**28%
*“Not even water resistant”*
**Leak-Proof**7%
*“it leaked”*
**Size-Overall**6%
*“Didn't fit”*
**Quality-Overall**5%
*“Cheap quality mattress cover”*
**Thickness**3%
*“Toilet paper at a rest area is thicker”*
**Moist/Dry**3%
*“then tumbled dry”*
**Durability**3%
*“when you try to pull it apart rips apart”*
**Advertised Vs Actual Product**3%
*“Description is inaccurate”*
**Functionality-Overall**2%
*“Did not work”*
**Stretchability/Expandability/Elasticity**2%
*“The elasticity of this is so BAD that it the pad will no stay in place”*
### **Top return reasons **
**Size-Overall**30%
**Material Quality**9%
**Advertised Vs Actual Product**8%
**Value For Money**5%
**Noise Level**4%
**Thin**4%
**Breathability**3%
**Cushion**3%
**Water Resistance**3%
**Comfort-Overall**3%
## **Common questions**
- **Is split top king mattress protector profitable to sell on Amazon United States?**
- The niche generates $63K/yr across 12 tracked products. 1 of 2 products launched in the last 360 days are still selling. 90-day search growth is -6.2%. Flapen's verdict: Skip it (39/100).
- **How competitive is the split top king mattress protector niche?**
- 7 brands and 9 sellers compete. The top 5 products take 73% of clicks and top 5 brands hold 96% of demand.
- **What do buyers complain about in split top king mattress protector?**
- Top complaints mined from reviews: Water Resistance, Leak-Proof, Size-Overall. The return rate is 1.5%.
- **What does it cost to enter the split top king mattress protector niche?**
- Listings span $27.46–$71.17; the average listing price is $46.98 (sweet spot $15–$100). The average incumbent carries 9,827 reviews — the moat a new listing must climb.
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